# What volume of concentrated #HCl# contains a mass of #125*g# #HCl#?

##### 3 Answers

#### Explanation:

The conc. acid you use in a lab is

We require

For volume, we divide the molar quantity by the concentration:

But of course the questioner has not specified the concentration with which we work. We are guessing.

Working back, a volume of

It should be given here that

The calculation of volume will be as fillows.

As the density of

Hence

It depends what figure you take as the molarity of concentrated hydrochloric acid. I took it as 12.19 M which gives an answer of 281.26 ml (which is roughly 282 ml!).

#### Explanation:

Concentrated hydrochloric acid has concentration of 12.19 mol/litre,

The molar mass of HCl is 36.458 g/mol.

125 g is therefore (125/36.458) = 3.4286 moles.

So the volume that would contain this number of moles is going to be (3.4286 / 12.19) = 0.28126 litres or 281.26 ml.