Solutions

Magnesium hydroxide, Mg(OH)₂, is a common antacid. What is the molar concentration if 29.0 g of Mg(OH)₂ is dissolved in 1.00 L of water?

• 0.29 M

• 0.50 M

• 1.00 M

• 2.00 M

How many milliliters of a 4.0 M NaCl solution will be needed to make 500 mL of a 2.0 M NaCl solution?

• 100 mL

• 250 mL

• 500 mL

• 2500 mL

What is the concentration in molarity when 11.0 g of CaCl₂ is added to water to make a 100 mL solution?

• 0.10 M

• 1.00 M

• 11.0 M

• 110 M

Determine the molarity of a solution that is prepared by diluting 200 mL of 0.450 M K₂Cr₂O₇ with 600 mL of water.

• 0.075 M

• 0.112 M

• 0.150 M

• 0.225 M

What is the concentration of a solution if 2.0 moles of sodium chloride is dissolved in 0.50 liter of water?

• 0.5 M

• 1.0 M

• 2.0 M

• 4.0 M

What is the concentration of a solution that was made by adding 10.00 g of KF in 2.0 L of water?

(molar mass K = 39.09; F = 19.99)

• 5.0 mol/L

• 0.25 mol/L

• 0.13 mol/L

• 0.085 mol/L

Tags

NGSS.HS-PS1-7

A student dissolves sodium chloride, NaCl, in distilled water. Which word best describes the water in this situation?

• reactant

• product

• solute

• solvent

A key component of a carbonated beverage is the carbon dioxide dissolved as a solute in water as the solvent. Which of the following explains why a bottle of club soda releases bubbles when opened?

• Carbon dioxide is supersaturated in water.

• Carbon dioxide is unsaturated in water.

• Carbon dioxide is the solvent in the solution.

• Carbon dioxide reacts with the oxygen in the environment.

Tags

NGSS.HS-PS1-5

A student investigated four different solutions and recorded observations and measurements in the table.

Based on the observations, which solution contains a solute that is a nonelectrolyte?

• Sol'n A

• Sol'n B

• Sol'n C

• Sol'n D

How is a supersaturated aqueous solution of salt in water prepared?

• Add salt to water and heat until the salt dissolves completely.

• Prepare a warm saturated solution and then cool the solution.

• Prepare a cool saturated solution and then warm the solution.

• Add a large amount of salt to water and then filter off the excess salt.