Litmus is a pH indicator, a chemical that turns different colors at different pHs.

只有极少量的水分子分解成了离子。

Earlier I used a pH indicator that showed an acidic pH by turning pink.

早些时候，我使用了一种 pH 指示剂， 它通过变成粉红色来显示酸性 pH 值。

And we determine it in the lab using pH indicators through a process called titration.

我们在实验室中通过称为滴定的过程使用 pH 指示剂来确定它。

It's actually a mix of two different pH indicators: bromocresol green and methyl red.

它实际上是两种不同 pH 指示剂的混合物：溴甲酚绿和甲基红。

Here we have 100 mL of water from the river to which I've added some pH indicator.

这里有 100 毫升的河水， 我在其中添加了一些 pH 指示剂。

We call that threshold the buffering capacity of the solution. And we determine it in the lab using pH indicators through a process called titration.

我们将该阈值称为解决方案的缓冲能力。我们在实验室中通过称为滴定的过程使用 pH 指示剂来确定它。

And this is just distilled water with a pH indicator in it that makes it blue when it's neutral or basic and it'll turn pink if it's at least a little bit acidic.

这只是蒸馏水， 里面有 pH 指示剂， 当它呈中性或碱性时， 它会变成蓝色，如果它至少有点酸性， 它会变成粉红色。