# In what order should strong acids and water be mixed?

Aug 28, 2016

$\text{If you spit in acid, it spits back! So should you spit in the acid?}$

#### Explanation:

$\text{May her rest be long and placid;}$
$\text{She added water to the acid;}$
$\text{The other girl did as she oughter;}$
$\text{She added acid to the water.}$

This is a very important practical tip. Especially as at A level students may sometimes deal with concentrated acids. A small quantity of water in concentrated acid will get very hot as it hydrates the acid, and it may spit. And if you get such a drop in your eye, that's your eye gone. On the other hand, when conc. acid is added to water, it won't spit; the solution will still heat up, but it will do so gradually.

So it's $\text{ACID to WATER}$

When you work with acids, you MUST ALWAYS wear safety spectacles; or glasses if you are a speccy. Chemists routinely wear lab coats to protect their clothing from acid spills.