Question

How do I prepare 10% w/v HCl from 37%(w/w) HCl (density 1.19g/ml)?
Thanks.

Answer 1

Sorry,final volume of 10% w/v HCl required is 100ml.

Answer 2

For a 10 w/v% solution, we want 10 g solute in 100 mL solution.
To obtain 10 g HCl from 37% solution, we need to take 10/(0.37*1.19) = 22.7 g of the concd solution.
(Check: 22.7 mL x 1.19 g/mL x 0.37 = 10 grams.)
Make the final volume to 100 mL and you will have 10 g/100 mL which is a 10%(w/v) solution. Check my thinking.