Question 1

Which of the following best describes a strong electrolyte in aqueous solution?

Accepted Answer

It completely dissociates into ions, allowing the solution to conduct electricity efficiently.

Question 2

A student wants to prepare 250 mL of a 0.50 M NaCl solution. How many grams of NaCl are required? ($$M_{NaCl} = 58.44\ g/mol)$$

Accepted Answer

$$7.31\ g$$

Question 3

Which of the following is NOT a characteristic of a nonelectrolyte?

Accepted Answer

It completely dissociates into ions in water.

Question 4

Which equation correctly relates molarity ($$M$$), moles of solute ($$n$$), and volume of solution ($$V in $$liters)?

Accepted Answer

$$M = \dfrac{n}{V}$$

Question 5

A solution is prepared by diluting 50.0 mL of 2.00 M HCl to a final volume of 200.0 mL. What is the final concentration?

Accepted Answer

$$0.50\ M$$

Question 6

Which of the following best describes a precipitation reaction?

Accepted Answer

Two aqueous solutions react to form an insoluble solid.

Question 7

Which of the following is an example of an oxidation-reduction (redox) reaction?

Accepted Answer

$$2Na + Cl_2$ \rightarrow 2NaCl$$

Question 8

Which statement about solution concentration is correct?

Accepted Answer

It is the amount of solute dissolved in a given quantity of solvent or solution.

Question 9

Which of the following is the correct net ionic equation for the precipitation of silver chloride from solutions of $$AgNO_3$$ and $$NaCl$$?

Accepted Answer

$$Ag^+ (aq) + Cl^- (aq) \rightarrow AgCl (s)$$

Question 10

Which of the following is a weak electrolyte?

Accepted Answer

Acetic acid ($$CH_3COOH)$$

Question 11

A nurse needs to prepare 500 mL of a 0.9% (w/v) saline solution for a patient. How many grams of NaCl are required?

Accepted Answer

$$4.5\ g$$

Question 12

Which of the following statements about molarity is FALSE?

Accepted Answer

Molarity is independent of temperature.

Question 13

Which of the following is the correct procedure to prepare 1.0 L of 0.10 M $$K_2SO_4$$ solution?

Accepted Answer

Dissolve $$17.4\ g of$$ $$K_2SO_4 in $$water and dilute to 1.0 L.

Question 14

Which of the following reactions is a neutralization reaction?

Accepted Answer

$$H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O$$

Question 15

A solution contains 0.25 mol of $$KBr in 500 mL of $$water. What is the molarity of the solution?

Accepted Answer

$$0.50\ M$$

Question 16

Which of the following best explains why glucose is a nonelectrolyte?

Accepted Answer

It dissolves in water but does not produce ions.

Question 17

Which of the following is the correct formula to calculate the amount of solute needed to prepare a solution of given molarity and volume?

Accepted Answer

$$	ext{mass} = M 	imes V 	imes 	ext{molar mass}$$

Question 18

Which of the following is a real-life example of a precipitation reaction?

Accepted Answer

Formation of kidney stones from calcium oxalate in urine.

Question 19

Which of the following best describes the process of dilution?

Accepted Answer

Adding solvent to a solution to decrease its concentration.

Solutions and Aqueous Reactions: Concentration, Electrolytes, and Reaction Types

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