Question

A salt solution has a volume of 250 mL and contains 0.70 mol of NaCl. What is the molarity of the solution?

Answer 1

`2.8 M`

Explanation:

Molarity is a measure of the concentration of a substance expressed in the quantity of solute in moles per liter of solution:

`M = (mol solute)/(L soln)`

`250mL` is equal to `0.250L`, so our molar concentration is

`M = (0.70 molNaCl)/(0.250Lsoln) = 2.8 M`