Answer to Question #305674 in General Chemistry for Sally

Question

A solution of hydrochloric acid in water is 60.0% HCl and 40% water, H2O, by weight. The solution has a density of 1.19 g/mL. What is the

a. molarity of hydrochloric acid (with water as the solvent)?

Answer 1

a)Take 1.00L of the solution

Mass of this litre is 1190g

Mass of HCl dissolved in the litre of soln.

=60%/100%×1190g=714g

Molar mass of HCl=36.45g/mol

Mol of HCl in 714g= 714g/36.45g/mol

=19.6 mol

Molarity of HCl sol= 19.6M