Question 1

Which of the following statements best describes an aqueous solution?

Accepted Answer

A homogeneous mixture where water is the solvent and one or more substances are dissolved in it.

Question 2

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

Accepted Answer

NaCl

Question 3

Which of the following equations represents the net ionic equation for the reaction between aqueous solutions of Pb(NO$$_3$$)$$_2$$ and KI?

Accepted Answer

$$\mathrm{Pb$$^{2+}$$(aq) + 2I^-(aq) \rightarrow $$PbI_2$$(s)}$$

Question 4

Which of the following is NOT a correct statement about strong and weak electrolytes?

Accepted Answer

A nonelectrolyte conducts electricity in water.

Question 5

Which of the following compounds will form a precipitate when mixed with a solution of Ba(NO$$_3$$)$$_2$$?

Accepted Answer

Na$$_2SO$_4$$

Question 6

What is the oxidation number of sulfur in SO$$_4^{2-}$$?

Accepted Answer

+6

Question 7

Which of the following reactions is a redox reaction?

Accepted Answer

$$\mathrm{2H_2O(l) \rightarrow 2H_2(g) + O_2$(g)}$$

Question 8

A solution is prepared by dissolving 23.4 g of Na$$_2SO$_4 in $$enough water to make 125 mL of solution. What is the molarity of the solution? (Molar mass of Na$$_2SO$_4 = 142.04 g/$$mol)

Accepted Answer

1.32 M

Question 9

Which of the following best describes the role of a base in an aqueous solution?

Accepted Answer

It increases the concentration of OH$$^-$$ ions in the solution.

Question 10

Which of the following antacids would neutralize stomach acid by producing water and a salt as the main products?

Accepted Answer

Milk of Magnesia (Mg(OH)$$_2)$$

Question 11

Which of the following is the correct net ionic equation for the neutralization of HCl with NaOH?

Accepted Answer

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

Question 12

Which of the following statements about the activity series of metals is correct?

Accepted Answer

A metal above hydrogen in the activity series will be oxidized by acids to produce hydrogen gas.

Question 13

Which of the following is a correct balanced molecular equation for the reaction of calcium carbonate with hydrochloric acid?

Accepted Answer

$$\mathrm{$$CaCO_3$$(s) + 2HCl(aq) \rightarrow $$CaCl_2$$(aq) + CO_2$(g) + H_2O(l)}$$

Question 14

A 0.025 M solution of calcium nitrate, Ca(NO$$_3$$)$$_2$$, is prepared. What is the concentration of nitrate ions in the solution?

Accepted Answer

0.050 M

Question 15

Which of the following best describes a metathesis (double displacement) reaction?

Accepted Answer

A reaction in which the cations and anions of two compounds exchange places.

Question 16

Which of the following is the correct net ionic equation for the precipitation reaction between aqueous solutions of calcium chloride and sodium carbonate?

Accepted Answer

$$\mathrm{Ca$$^{2+}$$(aq) + CO_3$^{2-}(aq) \rightarrow $$CaCO_3$$(s)}$$

Question 17

Which of the following is a weak electrolyte?

Accepted Answer

CH$$_3$$COOH (acetic acid)

Question 18

A solution is made by diluting 25.0 mL of 1.00 M NaCl to a final volume of 250.0 mL. What is the final concentration of NaCl?

Accepted Answer

0.100 M

Chapter 4: Reactions in Aqueous Solution – General Chemistry Study Notes

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