Question

What is the molarity of a solution made by dissolving 39.4 g of lithium chloride in enough water to make 1.59 l of solution?

Answer 1

molar mass LiCl = 42.394 g/mol

number of moles solute:

n = mass of solute / molar mass

n = 39.4 / 42.394

n = 0.929 moles

Therefore:

Molarity = number of moles / volume ( L )

M = 0.929 / 1.59

M = 0.584 mol/L