14.2 grams of Na2SO4 is dissolved in water to make a 2.50 L

solution. What is the molarity of the solution?__M

0.04 M

Explanation:

Given dа ta:

Mass of Na₂SO₄ = 14.2 g

Volume of solution = 2.50 L

Molarity of solution = ?

Solution:

Number of moles of Na₂SO₄:

Number of moles = mass / molar mass

Number of moles = 14.2 g / 142.04 g/mol

Number of moles = 0.1 mol

Molarity:

Molarity = number of moles of solute / volume of solution in L

Molarity = 0.1 mol / 2.50 L

Molarity = 0.04 M