Question 1

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

Accepted Answer

It completely dissociates into ions in water, resulting in a solution that conducts electricity well.

Question 2

Which compound will form a precipitate when mixed with a solution of Na2CO3(aq)?

Accepted Answer

CaCl2(aq)

Question 3

What is the net ionic equation for the reaction between aqueous solutions of AgNO3 and NaCl?

Accepted Answer

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

Question 4

A student mixes 100.0 mL of 0.200 M Na2SO4 with 100.0 mL of 0.100 M BaCl2. What mass of BaSO4 (molar mass = 233 g/mol) will precipitate? Assume complete reaction.

Accepted Answer

$$1.17\ \mathrm{g}$$

Question 5

Which of the following is a correct statement about the solubility rules for ionic compounds in water?

Accepted Answer

All chlorides are soluble except those of Ag+, Pb2+, and $$Hg2^2+.$$

Question 6

Which of the following is a weak electrolyte?

Accepted Answer

CH3COOH(aq)

Question 7

What is the molarity of a solution prepared by dissolving 25.5 g of KBr (molar mass = 119.0 g/mol) in enough water to make 1.75 L of solution?

Accepted Answer

$$0.122\ \mathrm{M}$$

Question 8

Which of the following best describes a neutralization reaction?

Accepted Answer

A reaction in which an acid and a base react to form a salt and water.

Question 9

Which of the following is the correct net ionic equation for the reaction of HCl(aq) with NaOH(aq)?

Accepted Answer

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

Question 10

A 10.0 mL sample of 10.0 M NaOH is diluted to a final volume of 250.0 mL. What is the concentration of the resulting solution?

Accepted Answer

$$0.40\ \mathrm{M}$$

Question 11

Which of the following reactions is a redox reaction?

Accepted Answer

$$\mathrm{Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)}$$

Question 12

What is the oxidation number of nitrogen in NO3^-?

Accepted Answer

$$+5$$

Question 13

Which of the following best explains why water is called the 'universal solvent'?

Accepted Answer

Because it can dissolve a wide variety of substances due to its polarity.

Question 14

Which of the following pairs will NOT result in a precipitation reaction when mixed?

Accepted Answer

NaNO3(aq) and Li2SO4(aq)

Question 15

A solution is prepared by dissolving 3.00 g of CuSO4 (molar mass = 159.6 g/mol) in water to form 250 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.0751\ \mathrm{M}$$

Question 16

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

Accepted Answer

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

Question 17

Which of the following best describes a nonelectrolyte?

Accepted Answer

A substance that dissolves in water to form a solution that does not conduct electricity.

Question 18

Which of the following is a spectator ion in the reaction between Na2SO4(aq) and BaCl2(aq)?

Accepted Answer

$$\mathrm{Na^+}$$

Question 19

Which of the following is the correct balanced molecular equation for the reaction between potassium carbonate and nickel(II) chloride in aqueous solution?

Accepted Answer

$$\mathrm{K_2CO_3(aq) + $$NiCl_2$$(aq) \rightarrow $$NiCO_3$$(s) + 2KCl(aq)}$$

Reactions in Aqueous Solutions: Solutions, Solubility, and Electrolytes

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