| 单词 | sodium hydroxide |
| 例句 | Other cars were carrying two chemicals--sodium hydroxide and ferrous sulfate. Metra delays linger after freight derailment 2011-11-04T10:57:00Z Now, carefully pour the sodium hydroxide into the pitcher of water, and stir just long enough to make sure it all dissolves. How to make soap at home (even if you failed chemistry) 2022-07-15T04:00:00Z Use your scale and measuring cup to carefully weigh 201 grams of sodium hydroxide and set it aside. How to make soap at home (even if you failed chemistry) 2022-07-15T04:00:00Z The solution is then neutralized with sodium hydroxide, which leaves the final product with an abundance of sodium. “Modern chicken has no flavor” — let’s make it in a lab 2013-03-17T16:00:00Z Essentially, this involves reacting it with sodium hydroxide and making a smaller molecule that is water-friendly. What is chlorophyll water? 2022-12-05T05:00:00Z In UPM's new mill the wood is chipped, then boiled with sodium hydroxide and sodium sulphide at high pressure. Does the paper industry need to cut its water usage? 2023-10-22T04:00:00Z The operator watched as the intruder clicked into various software programs before landing on a function that controls the amount of sodium hydroxide, or lye, in the plant’s water system. Cracks, hacks and attacks: The many risks facing California's aging water infrastructure 2023-05-08T04:00:00Z In that incident, an intruder breached the system using a remote access program to increase the amount of sodium hydroxide to be added to the water by a factor of 100, local officials said. EPA mandates states report on cyber threats to water systems 2023-03-03T05:00:00Z In 2014, Caldeira and colleagues added sodium hydroxide—also known as lye and an ingredient in many soaps and detergents—to a part of Australia’s Great Barrier Reef. Ocean geoengineering scheme aces its first field test 2022-12-15T05:00:00Z The laboratory preparation of ammonia is by the reaction of an ammonium salt with a strong base such as sodium hydroxide. Chemistry 2019-02-14T00:00:00Z One combined a little bit of the solvent with sodium hydroxide, a common component of soap, in water. Simple mix of soap and solvent could help destroy ‘forever chemicals’ 2022-08-17T04:00:00Z It was sodium hydroxide, the chemical in lye. Forever Chemicals No More? PFAS Are Destroyed With New Technique 2022-08-18T04:00:00Z “If enacted, EPA’s proposed rule would ban the manufacture of nearly one-third of chlorine and sodium hydroxide chemicals and have significant adverse effects on the supply of the nation’s drinking water,” the group said. EPA moves to ban the most common type of cancer-causing asbestos 2022-04-05T04:00:00Z The substance is found in products such brake linings and gaskets, and is used to manufacture chlorine bleach and sodium hydroxide, also known as caustic soda. EPA rule would finally ban asbestos, carcinogen still in use 2022-04-05T04:00:00Z It is possible to prepare the insoluble hydroxides of beryllium, magnesium, and other representative metals by the addition of sodium hydroxide to a solution of a salt of the respective metal. Chemistry 2019-02-14T00:00:00Z A hacker who sought to change the drinking water’s level of sodium hydroxide, the liquid drain ingredient lye, was prevented from doing so by a plant operator in the town near Tampa. Fears grow that cyber chaos will spark wars as hack attacks become more aggressive 2022-01-01T05:00:00Z It also purchased sodium hydroxide pellets and sulfuric acid which are intended to be used to generate the deadly gas. Senate Republicans expected to defeat Capitol attack commission bill – live 2021-05-28T04:00:00Z There are 10 manufacturing plants in the United States that still use asbestos to make chlorine and sodium hydroxide, but EPA officials said their reliance on this technology has declined over time. EPA moves to ban the most common type of cancer-causing asbestos 2022-04-05T04:00:00Z While chlorine is a commonly used disinfectant in water treatment, there are only 10 chlor-alkali plants in the U.S. that still use asbestos diaphragms to produce chlorine and sodium hydroxide. EPA rule would finally ban asbestos, carcinogen still in use 2022-04-05T04:00:00Z This equation confirms that sodium hydroxide is a base. Chemistry 2019-02-14T00:00:00Z After watching all this, the Oldsmar plant operator quickly lowered the sodium hydroxide level and called his boss. America’s drinking water is surprisingly easy to poison 2021-03-26T04:00:00Z The public was never in peril, though the intruder took “the sodium hydroxide up to dangerous levels,” the sheriff said. Hack exposes vulnerability of cash-strapped US water plants 2021-02-09T05:00:00Z The hacker then briefly increased the amount of sodium hydroxide from 100 parts per million to 11,100 parts per million. Hacker tried to poison Florida water supply near Super Bowl, police say 2021-02-08T05:00:00Z But another attempt was made early in the afternoon and this time the hacker accessed the treatment software and increased the sodium hydroxide content from 100 parts per million to 11,100 ppm. Hacker tries to poison water supply of Florida city 2021-02-08T05:00:00Z Aqueous solutions of magnesium chloride and sodium hydroxide react to produce solid magnesium hydroxide and aqueous sodium chloride. Chemistry 2019-02-14T00:00:00Z The National Library of Medicine’s website says that “at room temperature, sodium hydroxide is a white crystalline odorless solid that absorbs moisture from the air.” Wind, rain and a chemical fire. Hurricane Laura was gone but the crisis wasn’t over. 2020-08-27T04:00:00Z Nevertheless, she severed both hands below the thumbs, placed them in a clear plastic bucket and poured in sodium hydroxide to rehydrate the skin. How U.S. Policy Turned the Sonoran Desert Into a Graveyard for Migrants 2020-08-18T04:00:00Z Less than a gallon of sodium hydroxide, or lye, spilled. Authorities identify man killed in Brookings County crash 2018-10-29T04:00:00Z The Lapeer Police Department says the chemical was identified as sodium hydroxide, which is used in a variety of household cleaning products. Chemical on eastern MI slide that burned 2 kids identified 2018-08-15T04:00:00Z Water vapor reacts with sodium metal to produce solid sodium hydroxide and hydrogen gas. Chemistry 2019-02-14T00:00:00Z Their approach is to treat blocks of wood with sodium hydroxide and sodium sulphate in a chemical process similar to that used to remove lignin from papermaking pulp. Making buildings, cars and planes from materials based on plant fibres 2018-06-14T04:00:00Z Then he doused her in industrial-strength lye – a sodium hydroxide solution used in cleaning. The secrets of resilience: what one woman’s extraordinary trauma – and survival – can teach us 2018-05-02T04:00:00Z If the alkali is sodium hydroxide, the result is a hard soap, relatively difficult to dissolve. In Your Bathroom, the Scum of the Earth 2018-04-06T04:00:00Z Those minimal exhaust fumes had to go through a scrubber that used sodium chlorite, sodium hydroxide, sulfuric acid, sodium sulfide, three mixers, three pumps, a lot of water, and a great big blower. Fear of the Federal Government in the Ranchlands of Oregon 2018-01-18T05:00:00Z Potatoes can be peeled commercially by soaking them in a 3-M to 6-M solution of sodium hydroxide, then removing the loosened skins by spraying them with water. Chemistry 2019-02-14T00:00:00Z The company is able to buy Ethiopian sodium hydroxide, but it’s expensive, so Wan is considering ordering from China. Park life: workers struggle to make ends meet at Ethiopia's $250m industrial zone | William Davison 2017-12-05T05:00:00Z Tuesday after a report of a sodium hydroxide leak in the basement. Chemical leak prompts evacuation of Appleton business 2017-08-16T04:00:00Z Fourteen of the train’s 175 cars left the track, with one car leaking more than 700 gallons of sodium hydroxide — a caustic chemical used in cleaning agents. Virginia Avenue Tunnel project advances in D.C. amid neighborhood disruption 2017-01-28T05:00:00Z They were curious about actually being able to see the reaction that was taking place between the silver nitrate, ammonium nitrate, dextrose and sodium hydroxide. Harry Potter-inspired class focuses kids on magic of science 2016-12-21T05:00:00Z When animal fats are treated with a base like potassium carbonate or sodium hydroxide, glycerol and salts of fatty acids such as palmitic, oleic, and stearic acid are formed. Chemistry 2019-02-14T00:00:00Z A CSX train carrying sodium hydroxide derailed May 1 in Northeast Washington. Report: Wheel failure caused May CSX train derailment in Northeast D.C. 2016-08-17T04:00:00Z These products contain sodium hydroxide which is required by the Poison Prevention Packaging Act to be sealed with child-resistant packaging. Recalls this week: Liquid Plumr, safety gates, dressers 2016-07-15T04:00:00Z She says sodium hydroxide is only dangerous if touched. 5 train cars derail in Texas, spilling chemical, injuring 2 2016-07-03T04:00:00Z Three of the tank cars were found to be leaking, including 750 gallons of the liquid content of a tanker containing sodium hydroxide. In aftermath of derailment, D.C. officials turn focus to CSX and its cargo 2016-05-02T04:00:00Z The hydrofluoric acid solution was titrated, and 68.43 mL of 0.3172 M sodium hydroxide was required to reach the equivalence point. Chemistry 2019-02-14T00:00:00Z Fourteen of the train’s 175 cars derailed, with one car leaking more than 700 gallons of sodium hydroxide — a hazardous chemical used in cleaning agents. Report: Wheel failure caused May CSX train derailment in Northeast D.C. 2016-08-17T04:00:00Z According to the Centers for Disease Control and Prevention, the effects of exposure to sodium hydroxide can include irritated eyes, burning skin, loss of hair and swelling of the lungs. CSX train derails in Northeast Washington, leaking hazardous chemicals and disrupting travel 2016-05-01T04:00:00Z The DC fire department said sodium hydroxide, also known as lye and caustic soda, is leaking from one car. Washington DC chemical leak after CSX freight train derails - BBC News 2016-05-01T04:00:00Z After the train cars are removed from the site, CSX will begin soil remediation in the area affected by the sodium hydroxide spill, the company said. In aftermath of derailment, D.C. officials turn focus to CSX and its cargo 2016-05-02T04:00:00Z NBC4 Television reported that at least one of the leaking chemicals is sodium hydroxide, citing multiple sources at the scene. Freight train derails in Washington, cars leaking hazardous chemicals 2016-05-01T04:00:00Z As part of the cleanup effort, the soil affected by the sodium hydroxide spill was excavated and replaced with clean fill. Report: Wheel failure caused May CSX train derailment in Northeast D.C. 2016-08-17T04:00:00Z The derailment, about 70 cars into the train, spilled half the liquid contents of a 15,500- gallon tanker containing sodium hydroxide, D.C. CSX train derails in Northeast Washington, leaking hazardous chemicals and disrupting travel 2016-05-01T04:00:00Z The conventional method for extracting chitin uses sodium hydroxide, a caustic chemical. Entrepreneurs turn billion dollar seafood waste into profitable products 2015-12-14T05:00:00Z CSX described sodium hydroxide — also known as lye — as a chemical “used to produce various household products, including paper, soap and detergents.” In aftermath of derailment, D.C. officials turn focus to CSX and its cargo 2016-05-02T04:00:00Z Centers for Disease Control and Prevention website, sodium hydroxide is a caustic soda, similar to lye. Freight train derails in Washington, cars leaking hazardous chemicals 2016-05-01T04:00:00Z The fire marshal said tests confirmed that a fine white powder collected from around the blast crater was sodium hydroxide dust - one byproduct of the violent chemical reaction that also produces heat and hydrogen gas. Fire marshal: Seeping water caused radioactive dump blast 2015-11-27T05:00:00Z CSX described sodium hydroxide as a chemical “used to produce various household products, including paper, soap and detergents.” CSX train derails in Northeast Washington, leaking hazardous chemicals and disrupting travel 2016-05-01T04:00:00Z In the case of a release of sodium cyanide, for example, the United Nations recommends neutralising it with sodium hydroxide. China explosions: Potent chemical mix behind Tianjin blasts - BBC News 2015-08-14T04:00:00Z The material that leaked Sunday, sodium hydroxide, is not flammable and doesn’t vaporize, officials said. In aftermath of derailment, D.C. officials turn focus to CSX and its cargo 2016-05-02T04:00:00Z As a nine year old, Taylor mixed methanol and sodium hydroxide to create a biodiesel fuel, which he hoped his father would use to run his Coca-Cola delivery fleet. Why This 14-Year-Old Kid Built A Nuclear Reactor 2015-07-26T04:00:00Z The survey showed some tanks contained thousands of gallons of brine, oil and gas used in natural gas drilling, while one 275,000-gallon tank held hazardous sodium hydroxide, also called caustic soda. State IDs faulty tanks; now tank law is being scaled back 2015-05-02T04:00:00Z Ansley then mixes the milk with sodium hydroxide, commonly called lye, and fats in a process called saponification - the process that produces soap. Excess goat milk leads to Fairbanks soap-making business 2015-03-15T04:00:00Z Last May, it was finally ready to be bathed in a solution of sodium hydroxide to loosen the encrustation. After 150 years, Confederate submarine's hull again revealed 2015-01-30T05:00:00Z Exide also failed to properly report a Jan. 12 spill of sodium hydroxide, a caustic liquid used in the recycling process, the toxic substances agency said. Exide battery plant cited for hazardous waste violations 2015-01-28T05:00:00Z This coffee goes through a pharmaceutical process whereby it’s washed in sodium hydroxide, which removes the oil and smell from the grounds. This High-Tech Blazer Is Lined With Odor-Eating Coffee Grounds 2014-10-23T04:00:00Z Small business owners would have more cash for the capital goods they need, from spark plugs for mechanic shops to sodium hydroxide for soapmakers. How Business Can Change Cuba 2014-10-16T04:00:00Z Fire Chief Jason Shivers says the workers were unloading sodium hydroxide from a truck when residual gas was released and caused eye irritation Tuesday afternoon. 5 hospitalized in Forsyth Co. chemical spill 2014-07-29T04:00:00Z But the great feedstock of the chemicals industry is a different sodium chemical - sodium hydroxide, better known as caustic soda. Getting rid of dirt - and murder victims 2014-05-02T23:21:49Z This produced chlorine-free sodium hydroxide, but released tiny traces of mercury, which is very toxic, into the environment. Chlorine: From toxic chemical to household cleaner 2014-04-18T23:26:03Z Company spokeswoman Raquel Espinoza said one railcar was leaking sodium hydroxide, which can cause injuries or even death if it is inhaled or touches the skin. Two killed, five wounded in Calif. shooting; court says bracelets are not lewd 2013-08-06T00:17:35Z A police spokeswoman said: "The leaked chemical is a sodium hydroxide called Proxel and around 300 litres leaked from the lorry." Chemical spill forces A1 closure 2013-06-24T19:32:22Z According to the National Institutes of Health, sodium hydroxide - also known as lye and caustic soda - is found in many industrial solvents and cleaners. 5 hospitalized in Forsyth Co. chemical spill 2014-07-29T04:00:00Z To this mixture, one molar equivalent of sodium hydroxide was added. [Technical Comment] Comment on “ApoE-Directed Therapeutics Rapidly Clear β-Amyloid and Reverse Deficits in AD Mouse Models” 2013-05-23T18:25:20.267Z In the first of those phases, the bismuth-phosphate process, technicians immersed spent-fuel rods from nuclear reactors in a boiling solution of sodium nitrate and sodium hydroxide. What's Inside The Leaking Tanks At Hanford 2013-02-25T13:55:25Z The sodium hydroxide to carbonate then electrolysing to produce CO2: that looks a bit odd but is sensible enough. Insane Technology Watch: Making Petrol From Air 2012-10-19T14:33:08Z In 2001, DOE added sodium hydroxide and sodium nitrate to discourage the toxic sludge from corroding the tank. What's Inside The Suspect Nuclear Waste Tank At Hanford? 2012-08-27T13:03:54Z After that you warm the oil up and add sodium hydroxide and methanol. DIY biofuels: The fat of the land 2011-12-01T16:06:02Z The difference is that dust from red mud contains traces of sodium hydroxide, which reacts with the water content of the lungs and eyes, causing irritation or burns in many people. Recalculating 'Normal' in Hungarian Disaster Zone 2011-06-08T21:03:11Z N/10 hydrochloric acid to standardize N/10 alcoholic sodium hydroxide. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The production of sodium hydroxide in the first place requires vast amounts of energy. Insane Technology Watch: Making Petrol From Air 2012-10-19T14:33:08Z It is prepared from nitrobenzene by reducing it with stannous chloride and sodium hydroxide. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis After a few hours, the insoluble material is separated, washed once more with water, and then extracted with a very dilute solution of sodium hydroxide. History of Phosphorus Enolic Forms.—A final avenue for the interconversion of glucose, mannose, and fructose into one another, is through the spontaneous transformations which these undergo when dissolved in water containing sodium hydroxide or potassium hydroxide. The Chemistry of Plant Life Approximately N/10 alcoholic sodium hydroxide to fix and control the N/40 stearic acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The heat from the ship boiled the water which undoubtedly contained sodium carbonate and calcium hydroxide; presto, and the air was filled with clouds of sodium hydroxide. No Moving Parts In order to ascertain the effect of dilute ammonia on the cellulose substances of lignin, a dried 5 p.ct. caustic soda extract was extracted successively with 1, 2, 3, and 4 p.ct. sodium hydroxide solution. Researches on Cellulose 1895-1900 The products formed pass up through the chimney and are absorbed by the sodium hydroxide. An Elementary Study of Chemistry It is sometimes possible to distend or swell the flesh by utilizing a 1- to 3-percent solution of sodium hydroxide or potassium hydroxide, sometimes referred to as caustic potash. The Science of Fingerprints Classification and Uses The solution is then neutralized with alcoholic sodium hydroxide, using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Then add sodium hydroxide solution until the precipitate which first forms is redissolved and a clear blue liquid obtained. Physiology and Hygiene for Secondary Schools Dissolve in water containing a little sodium hydroxide; transfer to a 2-litre flask: dilute to 2 litres; add a few grams of white lead; shake up and allow to settle. A Text-book of Assaying: For the Use of Those Connected with Mines. The excess of the sodium hydroxide reverses the reaction of hydrolysis and the normal salt crystallizes out. An Elementary Study of Chemistry It is also suggested that the fingerprint examiner wear rubber gloves when using acetone, benzine, xylene, formaldehyde, potassium hydroxide, or sodium hydroxide. The Science of Fingerprints Classification and Uses Add 50 to 100 cc. hot, neutral alcohol, and titrate with N/2, N/4 or N/10 sodium hydroxide depending on the fatty acid content, using phenolphthalein as indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Castile soap Fine, hard, white, odorless soap made of olive oil and sodium hydroxide. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada The ferrous solution, used for reducing the silver citrate, had been brought to exact neutrality with sodium hydroxide. Scientific American Supplement, No. 711, August 17, 1889 Write the equations for the reactions between sodium hydroxide and bromine; between potassium hydroxide and iodine. An Elementary Study of Chemistry This point of caution is made because of the reaction of the potassium or sodium hydroxide, which is actually one of destruction. The Science of Fingerprints Classification and Uses First—Determine the strength of the N/10 alcoholic sodium hydroxide in terms of N/10 hydrochloric acid and calculate the factor, e. g.: Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Decomposing water by sodium, only one-half of the hydrogen contained is eliminated, the other half, together with all of the oxygen, uniting with the metal to form sodium hydroxide, H2O + Na = H + NaHO. Scientific American Supplement No. 822, October 3, 1891 Obtain the ratio of the sodium hydroxide solution to that of hydrochloric acid by dividing the number of cubic centimeters of acid used by the number of cubic centimeters of alkali required for neutralization. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes When the fats are heated with sodium hydroxide the sodium salts of these acids are formed. An Elementary Study of Chemistry Solution is made as follows: Prepare a solution of Rochelle salts,—175 grams of Rochelle salts, 50 grams of sodium hydroxide, and 250 cubic centimeters of water. School and Home Cooking The recovered benzyl alcohol can be used for the preparation of a second lot of benzyl benzoate only after it has been boiled with strong sodium hydroxide to remove all traces of benzaldehyde. Organic Syntheses It required 25 cc. of this solution to neutralize 30 cc. of a solution of sodium hydroxide. An Elementary Study of Chemistry Carry out the same procedure with a second burette, using the sodium hydroxide solution. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The sodium hydroxide in tube C prevents the carbon dioxide in the air from acting on the limewater. An Elementary Study of Chemistry A great deal of the chlorine required in the chemical industries is now made in this way in connection with the manufacture of sodium hydroxide. An Elementary Study of Chemistry The rest of the aldehyde is now precipitated by means of more sodium hydroxide solution, and comes down almost white. Organic Syntheses The volume of the sodium hydroxide consumed is then noted. An Elementary Study of Chemistry From the data obtained, calculate the volume of the hydrochloric acid solution which is equivalent to the volume of sodium hydroxide solution used in this titration. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The dilute solution of sodium hydroxide, filtered from the calcium carbonate, is evaporated to a paste and is then poured into molds to solidify. An Elementary Study of Chemistry If the concentrations of the two solutions are known, it is easy to calculate what weight of sodium hydroxide is required to neutralize a given weight of sulphuric acid. An Elementary Study of Chemistry In purifying the aldehyde, sodium carbonate may be used in place of sodium hydroxide for precipitation, but it causes much foaming. Organic Syntheses When ammonium chloride is warmed with sodium hydroxide, the ammonium and sodium change places, the reaction being expressed in the following equation. An Elementary Study of Chemistry Dissolve each of these in 10 cc. of sodium hydroxide solution, with stirring. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The melted lead and sodium hydroxide separate into two layers in G, and the sodium hydroxide, being on top, overflows into tanks from which it is drawn off and packed in metallic drums. An Elementary Study of Chemistry Thus, if we wish to call attention to the details of the reaction between sodium hydroxide and hydrochloric acid in solution, the equation is written as follows: Na+, OH- + H+, Cl- = Na+, Cl- + H2O. An Elementary Study of Chemistry This is shaken with sodium hydroxide solution until no more odor of sulfur dioxide is noticeable, then washed twice with water and distilled. Organic Syntheses After neutralizing a solution of sodium hydroxide with nitric acid, there remained after evaporation 100 g. of sodium nitrate. An Elementary Study of Chemistry A sample of sodium carbonate containing sodium hydroxide weighs 1.179 grams. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes They may be prepared by bringing together phosphoric acid and appropriate quantities of sodium hydroxide. An Elementary Study of Chemistry The hydroxide prepared by treating a solution of a copper salt with sodium hydroxide is a light blue insoluble substance which easily loses water and changes into the oxide. An Elementary Study of Chemistry The watery mother liquors from the crude methyl red are rendered alkaline with sodium hydroxide and distilled until no more dimethylaniline passes over. Organic Syntheses Could a solution of sodium hydroxide be substituted for the solution of calcium hydroxide in testing for carbon dioxide? An Elementary Study of Chemistry A one-gram sample of sodium hydroxide which has been exposed to the air for some time, is dissolved in water and diluted to exactly 500 cc. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes What was the strength of the sodium hydroxide solution in parts per hundred? An Elementary Study of Chemistry Chemically, calcium hydroxide is a moderately strong base, though not so strong as sodium hydroxide. An Elementary Study of Chemistry It is then dissolved in 5 per cent sodium hydroxide solution, filtered from any chromium hydroxide remaining, and also from unchanged nitrotoluene. Organic Syntheses It is not used to any very great extent, being replaced by the cheaper sodium hydroxide. An Elementary Study of Chemistry Owing to the carelessness of the analyst's assistant, the sodium hydroxide solution was used with phenolphthalein as an indicator in cold solution in making the analyses. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes These are exactly the changes which would take place if sodium hydroxide and sulphuric acid were to be set free at the electrodes, as required by the theory. An Elementary Study of Chemistry What weight of sodium hydroxide is necessary to neutralize the carbonic acid formed by the action of hydrochloric acid on 100 g. of calcium carbonate? An Elementary Study of Chemistry Procedure IN a 12-l. round-bottom flask fitted with a mechanical stirrer are placed 500 g. of technical b-naphthol dissolved in a warm solution of 140 g. of sodium hydroxide in 6 l. of water. Organic Syntheses The free base is liberated by adding to the phenylhydrazine hydrochloride 1 l. of a 25 per cent solution of sodium hydroxide. Organic Syntheses The combined extractions are well dried with 200 g. of solid sodium hydroxide, poured off, and distilled. Organic Syntheses When perfectly dry sulphuric acid is treated with perfectly dry sodium hydroxide, no chemical change takes place. An Elementary Study of Chemistry Great care must be taken in determining the end point in the neutralization of the sodium hydroxide by the sulfur dioxide. Organic Syntheses In the meantime, a sodium sulfite solution is prepared by dissolving 890 g. of sodium hydroxide, of about 90 per cent purity, in about 1 l. of water and then diluting to 6 l. Organic Syntheses The current of steam is then interrupted, the receiver is changed, and 1500 g. of 40 per cent sodium hydroxide solution are added cautiously through the steam inlet. Organic Syntheses The steam is shut off, and 250 cc. of 12 N. sodium hydroxide solution is added. Organic Syntheses Write the equations representing the reaction between hydrosulphuric acid and sodium hydroxide and ammonium hydroxide respectively. An Elementary Study of Chemistry |
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