Molarity & Dilution Review

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

• 3.2 L

• 0.31 L
• 3.9 L

• 4.6 L

If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?

• 21 mol

• 0.021 mol
• 1.0 mol

• 10. mol

Calculate the molarity of the following solution:  1.0 mole of KCl in 750.0 mL of solution.

• 0.75 M

• 99 M
• 1.3 M
• 2.0 M

What is the molarity of 4.0 g of NaCl (molar mass NaCl = 58.45 g/mol) in 3,800 mL of solution?

• 0.018 M
• 0.0011 M
• 1.1 M

• 0.062 M

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (molar mass NaCl = 58.45g/mol)?

• 0.625 g NaCl
• 625 g NaCl
• 36.5 g NaCl
• 0.0400 mol NaCl

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (molar mass C₁₂H₂₂O₁₁ = 342g/mol) in 250. mL of water.

• 2.18 M
• 0.746 M
• 1.18 M
• 0.545 M

Concentrated H₂SO₄ is 18.0 M. What volume is needed to make 2.00 L of 1.00 M solution?

[Don't forget sig figs & the label!!]

50.0 ml of a 1.00 M solution is diluted until the final volume is 80.0 ml. What is the new concentration?

M₁V₁ = M₂V₂

• 8.00 M

• 0.500 M

• 0.625 M

• 1.60 M

If you have 34.0 mL of a 0.500 M NaBr solution, what will the concentration be if the solution is diluted to a volume of 90.0 mL?

M₁V₁ = M₂V₂

• 0.189 M

• 3.78 M

• 0.389 M

• 1.76 M

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250.0 mL?

M₁V₁ = M₂V₂

• 15.9 M
• 0.636 M
• 0.642 M
• 1.59 M

Tags

NGSS.HS-PS1-7