Practice Quiz Solutions and Molarity Calculations

What is the molarity of a 0.5 L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

(Na =23, H=1, O=16)

• 0.8 M

• 1.5M

• 3.0M

• 6.0M

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

• 1074 mol
• 0.069 mol
• 1.07 mol
• 62.7 mol

Tags

NGSS.HS-PS1-7

A beaker contain 795 mL of 0.35 M of Na₂SO₄ solution. Calculate the mass in grams of Na₂SO₄.

(Na =23, S=32, O=16)

• 39.51 g

• 40.00 g

• 39.05 g

• 0.28 g

• 119 g

What is the molarity of 3 mole of hydrochloric acid in 3 L of water. 

• 3 M HCl

• 1 M HCl

• 6 M HCl

• 9 M HCl

• 4 M HCl

How many Liters are required to make 3.5 M hydrochloric acid using 1.1 moles? 

• 3.18 L

• 0.31 L

• 3.85 L

• 4.6 L

• 90.22 L

How many Liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? 

• 2 M NaOH

• 3 M NaOH

• 4 M NaOH

• 6 M NaOH

• 5 M NaOH

Determine the molarity of 2.25 mole of sulfuric acid, H₂SO₄, dissolved in 725 mL of solution.

• 322.2 M
• 3.1 M
• 0.32 M
• 2.25 M

How many moles are needed to make 2.5 L of a 3.8 M solution? 

• 9.5 mol
• 0.66 mol
• 1.5 mol
• 15 mol

What is the molarity of a solution containing 400 g of CuSO₄ (Use 160 g/mol as molar mass) in 4.0 L of solution?

• 100 M

• 1.6 M

• 0.625 M

• 0.01 M

• 0.25 M

What is the molarity of 550 mL of NaBr solution that contains 0.80 mole NaBr?

• 1.45 M

• 0.44 M

• 0.80 M

• 2.50 M