And stomach acid, with a pH of 1, gives one hydrogen ion for every ten other molecules.

pH 为1的胃酸，每十个分子就电离出一个氢离子。

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。

To accomplish this, cells use a special ion transporter that exchanges the hydrogen ion for a potassium ion across the cell membrane.

为此，细胞运用特殊的离子转运体，跨细胞膜以1个钾离子交换1个氢离子。

We haven't formed any hydrogen ions yet, so that stays at zero for now.

我们还没有形成任何氢离子， 所以现在保持为零。

Lemon juice, for example, has a pH of about 2, which means that there's one hydrogen ion donated for every hundred other molecules in the juice.

例如，柠檬汁的pH值约为2，这意味着柠檬汁中每一百个分子电离出一个氢离子。

Remember the hydrogen ion produced along with bicarbonate in the red blood cell?

还记得红细胞中与碳酸氢根一起产生的氢离子吗？

So something with a pH of 8 would leave 1 hydrogen ion for every 10 hydroxide ions.

因此，pH 值为 8 的物质每 10 个氢氧根离子就会留下 1 个氢离子。

So this makes this an ion, and actually right over here, this is a hydrogen, this is a hydrogen ion right over here.

所以这使它成为一个离子，实际上就在这里，这是一个氢，这是一个氢离子就在这里。

That's right, even though an acid is defined by its ability to give up hydrogen ions, it is identified by it's oxygen content.

没错，尽管酸是由其释放氢离子的能力来定义的，但它是由氧含量来识别的。