| 单词 | hydroxyl ion |
| 例句 | Strong bases release most or all of their hydroxyl ions; weak bases release only some hydroxyl ions or absorb only a few H+. Anatomy and Physiology 2013-06-19T00:00:00Z At the electrodes, however, the small quantity of hydrogen and hydroxyl ions from the water are liberated first in cases where the ions of the salt have a higher decomposition voltage. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The greater the concentration of the hydroxyl ions, i.e. the greater the dissociation, the stronger is the base. The Mechanism of Life In the solution, therefore, there is now an excess of hydroxyl ions; consequently it has an alkaline reaction and the litmus turns blue. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" Water forms an appreciable number of hydrogen and hydroxyl ions, and very weak bases such as bismuth hydroxide are dissociated to but a very slight extent. An Elementary Study of Chemistry The charged regions of these molecules can bind hydrogen and hydroxyl ions, and thus function as buffers. Anatomy and Physiology 2013-06-19T00:00:00Z A buffer is a substance that prevents a radical change in fluid pH by absorbing excess hydrogen or hydroxyl ions. Anatomy and Physiology 2013-06-19T00:00:00Z There can therefore be neither hydrogen nor hydroxyl ions present in the solution. An Elementary Study of Chemistry Thus, in the general reaction between an acid and a base, the essential action is between the univalent hydrogen ion and the univalent hydroxyl ion. An Elementary Study of Chemistry It has the formula OH and is called the hydroxyl ion. An Elementary Study of Chemistry Most commonly, the substance that absorbs the ions is either a weak acid, which takes up hydroxyl ions, or a weak base, which takes up hydrogen ions. Anatomy and Physiology 2013-06-19T00:00:00Z DEFINITION: A base is a substance which produces hydroxyl ions when dissolved in water or other dissociating liquids. An Elementary Study of Chemistry The solution of ammonia in water is found to have strong basic properties and therefore contains hydroxyl ions. An Elementary Study of Chemistry A solution of potassium cyanide turns red litmus blue, and must therefore contain hydroxyl ions. An Elementary Study of Chemistry Since all bases produce hydroxyl anions, while the cations of each are different, the properties which all bases have in common when in solution must be due to the hydroxyl ions. An Elementary Study of Chemistry |
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