Question

Calculate the concentration of sodium chloride present in mass % for a solution of 45 g of salt in 1200 mL of water.

The density of water is 1.00 g/mL.

Answer 1

Moles of sodium s chloride =$\frac{45}{58.44}=0.77moles$

Volume $=\frac{1200}{1000}=1.2L$

Molarity $=\frac{0.77}{1.2}=0.64M$