A student wants to prepare 0.5M HCl. The label of a commercial hydrochloric acid shows that S.G.=1.18 and concentration of HCl is 37%. Calculate the volume of commercial hydrochloric acid dose the chemist requires to make up 1.5L of the dilute acid.

Answer 1

So, sg 1.18
so 1 liter has a mass of 1180 grams. 37 percent or 437 grams of HCL, and the remander is water.

Molarity of HCL=(437/36.5)/1=11.97 or in sig figs, 12.0

So you want to dilute it 12/.5=24 times
which means one part acid, 23 parts water.
how much is one part? well, 24 parts is 1.5 L, so one part=1.5/24=62.5 ml of acid, and 1.435 liters of water. Alsways add acid to water, stir, and label.