Concentration Review Lesson

Multiple Choice

How many L 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

Multiple Choice

If you have 0.0450 L of 0.465 M potassium bromide. How many moles of potassium bromide are present? (correct sig figs!)

• 20.9 mol

• 0.021 mol

• 0.02 mol

• 0.0209 mol

Multiple Choice

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

Multiple Choice

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (MM = 342) in 250 mL of water.

• 2.18 M

• 0.746 M

• 1.18 M

• 0.545 M

Multiple Choice

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0 M

• 0.22 m

• 135 m

• 2.0m

Multiple Choice

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

• 5 mol/kg. solvent

• 4 mol/kg solvent

• 3 mol/kg. solvent

• 2.5 moles /kg solvent

Multiple Choice

How many kilograms of H2O must be added to 75.5 g of Ca(NO3)2 to form a 0.500m solution?

• 0.920 Kg

• 0.00662 Kg

• 37.75 Kg

• 0,03775 Kg

Multiple Choice

What is the molality of a solution made from 1.14 mol of CO2 dissolved in 1000 mL of acetone? (Density of acetone = 0.789 g/mL)

• 1.44 m

• 1.34 m

• 1.24 m

• 1.54 m

Multiple Choice

Calculate the molality of a solution that is 10.0% ethanol by mass.

Ethanol, C₂H₅OH , has a molar mass of 46.068 g/mol

• 2.11 m

• 2.31 m

• 2.41 m

• 2.21 m

Multiple Choice

What is the concentration of solution (in ppm) made up of 0.005 grams of solute in 350 grams of solution?

• 14.3 ppm

• 12.1 ppm

• 1.4 ppm

• 9.8 ppm

Multiple Choice

A solution is made from 7 grams of solute dissolved in 1450 grams of solvent. What is the concentration of this solution in ppm?

• 4,804.4 ppm

• 4,827.6 ppm

• 4,851.0 ppm

• 4,790.0 ppm

Multiple Choice

What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution?

• 0.014 %

• 1.4 %

• 0.13%

Multiple Choice

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

Multiple Choice

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

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M

Multiple Choice

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid? (correct sig figs!)

• 27.8 mL
• 27.78 mL
• 2.8 mL
• 278 mL