# Calculate the molality of a sulfuric acid solution of specific gravity 1.2 containing 27% #H_2SO_4# by **weight**?

##### 1 Answer

#### Explanation:

We want the expression......

And our

And thus we can work with a

Here we multiplied that mass of solution by the percentage of acid, and then the percentage of water, to get the moles of solute, and moles of water solvent. Please check my figures...........

Just as an exercise, we could also interrogate the

And thus.....we calculate the concentration a ONE MILLILITRE of this acid solution......which has a mass of

And so......

.........for a more dilute solution, molality would often be identical to molarity. When we use sulfuric acid solution, the solution density is such that difference in the concentrations occur.