Question 1

Which of the following best describes a neutralization reaction in aqueous solution?

Accepted Answer

A reaction in which a salt and water are produced from an acid and a base.

Question 2

What is the net ionic equation for the reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

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

Question 3

When a carbonate reacts with an acid, which products are formed?

Accepted Answer

A salt, carbon dioxide gas, and water

Question 4

Which of the following reactions produces a dangerous gas and should be performed under a fume hood?

Accepted Answer

$$\mathrm{Na_2S(aq) + H_2SO_4(aq) \rightarrow Na_2SO_4(aq) + H_2S(g)}$$

Question 5

Which statement correctly distinguishes precipitation and neutralization reactions?

Accepted Answer

Precipitation reactions form insoluble ionic compounds, while neutralization reactions transfer protons between reactants.

Question 6

In the reaction $$\mathrm{Mg(s) + 2HCl(aq) \rightarrow $$MgCl_2$$(aq) + H_2$(g)}$$, what happens to the oxidation numbers of Mg and H?

Accepted Answer

Mg is oxidized from 0 to +2, H is reduced from +1 to 0.

Question 7

Which of the following is the correct oxidation number for sulfur in sulfate ion ($$\mathrm{SO_4$^{2-}}$$)?

Accepted Answer

+6

Question 8

A solution is prepared by dissolving 23.4 g of sodium sulfate ($$\mathrm{Na_2SO_4}) in $$enough water to make 125 mL of solution. What is the molarity of the solution? (Molar mass of $$\mathrm{Na_2SO_4} = 142 g/$$mol)

Accepted Answer

$$\mathrm{1.32\ M}$$

Question 9

What is the molar concentration of each ion in a 0.025 M solution of calcium nitrate ($$\mathrm{Ca(NO_3$)_2}$$)?

Accepted Answer

$$\mathrm{[Ca$$^{2+}$$] = 0.025\ M}$$, $$\mathrm{[NO_3$^-] = 0.050\ M}$$

Question 10

Which of the following metals will NOT react with acids to produce hydrogen gas, based on the activity series?

Accepted Answer

Copper ($$\mathrm{Cu})$$

Question 11

If 50.0 mL of 0.200 M $$\mathrm{HCl} is $$titrated with 0.100 M $$\mathrm{NaOH}$$, what volume of $$\mathrm{NaOH} is $$required to reach the equivalence point?

Accepted Answer

$$\mathrm{100\ mL}$$

Question 12

Which of the following is a correct net ionic equation for the reaction of acetic acid ($$\mathrm{CH_3COOH}) $$with barium hydroxide ($$\mathrm{Ba(OH)_2}$$)?

Accepted Answer

$$\mathrm{CH_3COOH(aq) + OH^-(aq) \rightarrow H_2O(l) + CH_3COO^-(aq)}$$

Question 13

A solution is diluted from 3.0 M to 1.0 M by adding water. If the final volume is 450 mL, what was the initial volume of the concentrated solution?

Accepted Answer

$$\mathrm{150\ mL}$$

Question 14

Which of the following is true about the sum of oxidation numbers in a polyatomic ion?

Accepted Answer

It equals the charge of the ion.

Question 15

How many grams of calcium hydroxide ($$\mathrm{Ca(OH)_2}$$, molar mass = 74 g/mol) are needed to neutralize 25.0 mL of 0.100 M nitric acid ($$\mathrm{$$HNO_3$$}$$)?

Accepted Answer

$$\mathrm{0.093\ g}$$

Question 16

Which of the following is a displacement reaction?

Accepted Answer

$$\mathrm{Cu(s) + 2Ag^+(aq) \rightarrow Cu$$^{2+}$$(aq) + 2Ag(s)}$$

Question 17

Which of the following statements about noble metals is correct?

Accepted Answer

They are found at the bottom of the activity series and are less reactive.

Reactions in Aqueous Solution: Neutralization, Redox, and Solution Concentrations

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