Unit 5 Concept 2 Notes - Concentrations of Solutions

Multiple Choice

Which of the following best describes the concept of concentration in a solution?

• The amount of solute dissolved in a given quantity of solvent

• The temperature at which a solution boils

• The color of the solution

• The pressure exerted by the solution

Open Ended

Why is understanding the concentration of solutions important in chemistry and everyday life?

Multiple Choice

Which of the following best describes a concentrated solution?

• A solution with a large amount of solute dissolved in solvent

• A solution with a small amount of solute dissolved in solvent

• A solution with no solute

• A solution with only solvent

Fill in the Blank

Fill in the blank: Molarity (M) is defined as the number of moles of solute per ___ of solution.

Multiple Select

Which of the following are required to calculate the mass of NaCl needed to make a specific molarity solution?

• Volume of solution

• Desired molarity

• Molar mass of NaCl

• Temperature of the solution

Open Ended

Find the molarity of a solution of 58.0 g of AgNO3 dissolved in 1.00 L of solution.

Fill in the Blank

Fill in the blank: Molality (m) is defined as the number of moles of solute per ___ of solvent.

Multiple Choice

What is the molality of a solution made by dissolving 16.7 g of glucose (C6H12O6) in 125 g of water?

• 0.742 mol/kg

• 0.125 mol/kg

• 0.0927 mol/kg

• 1.34 mol/kg

Multiple Choice

Which of the following best defines molality?

• Moles of solute per kg of solvent

• Moles of solute per liter of solution

• Grams of solute per kg of solvent

• Grams of solute per liter of solution

Fill in the Blank

Fill in the blank: The equation for dilution is M1V1 = ___V2.

Multiple Choice

Which of the following actions will decrease the concentration of a solution?

• Adding more solvent

• Removing solvent

• Adding more solute

• Evaporating solvent

Multiple Choice

After adding 50 mL of water to 125 mL of 0.15 M NaOH solution, what is the new molarity of the solution?

• 0.107 M

• 0.150 M

• 0.200 M

• 0.075 M

​ODD ONLY!!!!!

Open Ended

What is one key concept you learned about concentrations of solutions during this lesson?