Reactions in Aqueous Solutions Review

Determine the concentration of sodium ions if 320 grams of sodium sulfate, Na₂SO₄, is dissolved to make 725 mL of solution.

(molar mass of Na₂SO₄ = 142.04 g/mol)

• 1.63 M

• 3.11 M

• 0.00311 M

• 6.21 M

Determine the concentration of magnesium ions if 320 grams of magnesium sulfate, MgSO₄, is dissolved to make 725 mL of solution.

(molar mass of MgSO₄ = 120.37 g/mol)

• 1.93 M

• 0.00367 M

• 3.67 M

• 7.33 M

How many grams of Cu(NO₃)₂ are needed to make 2.5 L of a 3.8 M solution? 

(molar mass of Cu(NO₃)₂ = 187.56 g/mol)

• 1800 g

• 120 g

• 290 g

• 0.051 g

Tags

NGSS.HS-PS1-7

What is the molarity of 4.00 grams of KNO₃ in 3.80 L of solution?

(molar mass of KNO₃ = 101.10 g/mol)

• 0.0104 M

• 0.0207 M

• 1.05 M

• 1.08 M

If 30.0 mL of a solution that has a 1.82 M is diluted to 1.14 M, what is the VOLUME of my ending solution?

• .07mL

• 19mL

• 47.9mL

• 63.8mL

What is the volume (in liters) of a 0.20 M solution that contains 42.16 grams of Na₂SO₄ dissolved in it?

(molar mass of Na₂SO₄ = 142.04 g/mol)

• 1.5 L

• 0.060 L

• 0.67 L

• 2.3 L

Tags

NGSS.HS-PS1-7

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it (add both volumes together for V₂)?

• .189 M

• 3.78 M

• .389 M

• 1.76 M

Tags

NGSS.HS-PS1-7

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?

• 27.8 mL

• 27.78 mL

• 2.8 mL

• 278 mL

What makes a solution a STRONG electrolyte?

• A solution that contains a solute that fully ionizes in water.

• A solution that contains a solute that partially ionizes in water.

• A solution that contains a solute that doesn't ionize in water.

• A solution that is a solid at room temperature.