So now that we know what molarity is, let's figure out the molarity of this hydrogen peroxide solution.

所以现在我们知道什么是摩尔浓度， 让我们计算出这种过氧化氢溶液的摩尔浓度。

Molality refers to moles per unit mass and molarity refers to moles per unit volume.

摩尔浓度是指每单位质量的摩尔数， 摩尔浓度是指每单位体积的摩尔数。

As a rule, molarity equals the number of moles of solute divided by liters of solution.

通常，摩尔浓度等于溶质的摩尔数除以溶液的升数。

Now that we know the molarity of the original formula we can start thinking about how to dilute it.

既然我们知道了原始配方的摩尔浓度， 我们就可以开始考虑如何稀释它了。

M2 and V2 are the molarity and volume of the dilute solution.

M2 和 V2 是稀溶液的摩尔浓度和体积。

But as you dilute a solution, it's volume grows, the moles stay the same, and it's molarity thus shrinks.

但是当你稀释溶液时， 它的体积会增加， 摩尔数保持不变， 因此它的摩尔浓度会缩小。

And we discovered how to calculate a solution's molarity, as well as how to dilute a solution using the dilution equation.

我们还发现了如何计算溶液的摩尔浓度， 以及如何使用稀释方程来稀释溶液。

The number of moles of solute that are in a solution is known as it's molar concentration, that's also known as a solution's molarity.

溶液中溶质的摩尔数称为摩尔浓度，也称为溶液的摩尔浓度。

So in our case, M1 equals 0.88, that's the molarity of the hydrogen peroxide solutionthat we've got.

所以在我们的例子中， M1 等于 0. 88，这是我们得到的过氧化氢溶液的摩尔浓度。

All that's missing is the volume of the peroxide solution that we must add to 38 liters of water to get to our target molarity.

所缺少的只是我们必须添加到 38 升水中以达到我们的目标摩尔浓度的过氧化物溶液的体积。

And to bleach the stains out of laundry we need a 0.1 molar solution, that's M2, the molarity we want to get to.

为了漂白衣物上的污渍， 我们需要 0. 1 摩尔浓度的溶液， 即 M2，即我们想要达到的摩尔浓度。

So to calculate the molarity of this solution we first need to figure out how many moles of hydrogen peroxide are in 30 grams of hydrogen peroxide.

因此，要计算该溶液的摩尔浓度，我们首先需要计算出 30 克过氧化氢中有多少摩尔过氧化氢。

The square brackets in the formula are used by chemists to represent molar concentration, or molarity: moles of solute per liter of solution.

化学家使用公式中的方括号表示摩尔浓度或摩尔浓度：每升溶液中溶质的摩尔数。

As a rule, molarity equals the number of moles of solute divided by liters of solution. So a one molar solution, contains one mole of solute per one liter of solution.

通常，摩尔浓度等于溶质的摩尔数除以溶液的升数。因此，一摩尔溶液每升溶液含有一摩尔溶质。

In our case, a mole of hydrogen peroxide weighs 34.014 grams. The number of moles of solute that are in a solution is known as it's molar concentration, that's also known as a solution's molarity.

在我们的例子中，一摩尔过氧化氢重 34. 014 克。 溶液中溶质的摩尔数称为摩尔浓度， 也称为溶液的摩尔浓度。