Question

What is the molarity of a 650. mL solution containing 63 grams of NaCl?

Answer 1

Molarity = 1.66 mol.L⁻¹

Step-by-step explanation:

Answer 2

This problem is solved using following formula,

Molarity = Moles ÷ Volume of Solution ----- (1)

Data Given;
Volume = 650 mL = 0.65 L

Mass = 63 g

Solution:

First of all calculate moles for given mass,

Moles = Mass ÷ M.mass

Moles = 63 g ÷ 58.4 g.mol⁻¹

Moles = 1.08 mol

Now, putting values of mole and volume in eq. 1,

Molarity = 1.08 mol ÷ 0.65 L

Molarity = 1.66 mol.L⁻¹