Question

What is the molarity of sodium chloride in a solution containing 0.50 mol of sodium chloride in 500 ml of water?

Answer 1

Answer:

• The molarity of the solution is 1.0 M

Explanation:

1) Data:

a) n = 0.50 mol

b) V = 500 ml

c) M = ?

2) Formula:

• Molarity, M = number of moles of solute / volume of solution in liters

                       M = n / V (liter)

3) Conversion of units:

• 500 ml × 1.00 liter / 1,000 ml = 0.500 liter

4) Solution:

Substitute in the formula:

• M = n / V (liter) = 0.50 mol / 0.500 liter = 1.0 mol / liter = 1.0 M

The answer must be reported with two significant figures.