The pH scale only really works down to 0, where there's one hydrogen ion for every molecule in the solution.

pH 值测量范围最低只能到0，此时溶液中每一个分子都能电离出一个氢离子。

This my friends, is the basis of the pH scale.

实际上，这些离子在远小于一秒的时间内就会重组为水分子。

The pH scale is the most common way of measuring an acid's strength, based on the concentration of active hydrogen ions when the acid is mixed with water.

pH 值是衡量酸性强弱最常用的一种方法，根据酸在水溶液中的活泼氢离子浓度进行计算。

But one thing you need to remember about the pH scale, because pH is calculated from a negative logarithm, it turns everything backward.

而且由于它是一个十分特殊的反应，因此它有一个独特的名字——水的电离常数，也就是Kw。

Once a base is strong enough to deprotonate water, the pH scale doesn’t really work anymore.

一旦碱的强度足以使水去质子化，pH 值就不再有效了。

Because of how the pH scale works, that’s about 10,000 times more acidic than normal rain!

由于 pH 值的工作原理， 它的酸度比普通雨水强 10,000 倍！

One step up on the pH scale means that there are a tenth the hydrogen ions in the solution.

pH 值升高一级意味着溶液中有十分之一的氢离子。

On the pH scale which measures acidity, each whole number is 10 times more acidic than the one above it.

在测量酸度的 pH 刻度上，每个整数比它上面的整数酸度高 10 倍。

The most common way to measure the strength of a base is the pH scale, which typically runs from 0 to 14.

衡量碱强度的最常用方法是 pH 标度，通常在 0 到 14 之间。