Question 1

Which of the following best describes an aqueous solution?

Accepted Answer

A homogeneous mixture in which water is the solvent and other substances are solutes.

Question 2

Which statement correctly distinguishes a strong electrolyte from a weak electrolyte?

Accepted Answer

A strong electrolyte dissociates completely in water, while a weak electrolyte dissociates only partially.

Question 3

Which of the following compounds is a nonelectrolyte when dissolved in water?

Accepted Answer

C_2H_5OH (ethanol)

Question 4

Given the reaction: $$\mathrm{Mg(NO_3$)_2(aq) + 2NaOH(aq) \rightarrow Mg(OH)_2(s) + 2NaNO_3(aq)}$$, what type of reaction is this?

Accepted Answer

Precipitation reaction

Question 5

Which of the following is a strong acid?

Accepted Answer

$$HNO_3$$

Question 6

What is the net ionic equation for the reaction between HCl(aq) and NaOH(aq)?

Accepted Answer

$$\mathrm{H^+(aq) + OH^-(aq) \rightarrow H_2O(l)}$$

Question 7

Which of the following is true about the oxidation number of oxygen in hydrogen peroxide ($$\mathrm{H_2O_2}$$)?

Accepted Answer

It is $$-1.$$

Question 8

A solution of Na_2SO_4 is mixed with a solution of $$BaCl_2. $$What is the precipitate formed?

Accepted Answer

$$BaSO_4$$

Question 9

Which of the following is the correct oxidation number for sulfur in $$\mathrm{Na_2SO_4}$$?

Accepted Answer

$$+6$$

Question 10

Which of the following reactions is a neutralization reaction?

Accepted Answer

$$\mathrm{HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)}$$

Question 11

Which of the following is a weak electrolyte?

Accepted Answer

CH_3COOH

Question 12

What is the oxidation number of hydrogen in $$\mathrm{NaH}$$?

Accepted Answer

$$-1$$

Question 13

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which an insoluble solid forms when two solutions are mixed.

Question 14

Which of the following is NOT a strong base?

Accepted Answer

$$NH_3$$

Question 15

If a compound starts with H and is not on the list of strong acids, what is it classified as?

Accepted Answer

Weak acid

Question 16

Which of the following is the correct molecular equation for the reaction between acetic acid and barium hydroxide?

Accepted Answer

$$\mathrm{CH_3COOH(aq) + Ba(OH)_2(aq) \rightarrow 2H_2O(l) + Ba(CH_3COO)_2(aq)}$$

Question 17

Which of the following is the correct net ionic equation for the reaction between carbonate and hydrochloric acid?

Accepted Answer

$$\mathrm{CO_3$^{2-}(aq) + 2H^+(aq) \rightarrow CO_2$(g) + H_2O(l)}$$

Question 18

Which of the following is true about oxidation and reduction?

Accepted Answer

Oxidation is the loss of electrons and reduction is the gain of electrons.

Question 19

Which of the following ions is always soluble in water according to the solubility rules?

Accepted Answer

$$NO_3^-$$

Reactions in Aqueous Solutions: Solutions, Electrolytes, Solubility, and Precipitation

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