Question 1

Which of the following statements best explains why a solution of NaCl(aq) conducts electricity, while a solution of C\_6H\_{12}O\_6(aq) does not?

Accepted Answer

NaCl dissociates into ions in water, while C\_6H\_{12}O\_6 does not form ions.

Question 2

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

Accepted Answer

$$NaNO_3$$

Question 3

A student mixes aqueous solutions of Pb($$NO_3)_2 $$and KI. A yellow precipitate forms. What is the net ionic equation for this reaction?

Accepted Answer

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

Question 4

Which of the following is a correct classification for acetic acid, HC_2H_3O_2, in aqueous solution?

Accepted Answer

Weak acid and weak electrolyte

Question 5

Which of the following best describes the role of water in the reaction: $$\mathrm{HCl(aq) + H_2O(l) \rightarrow H_3O^+(aq) + Cl^-(aq)}$$?

Accepted Answer

Water acts as a Brønsted-Lowry base by accepting a proton.

Question 6

Which of the following solutions will have the highest electrical conductivity?

Accepted Answer

0.10 M NaOH(aq)

Question 7

A 0.250 M solution of Na_2SO_4 is prepared. What is the concentration of Na^+ ions in the solution?

Accepted Answer

$$0.500\ \mathrm{M}$$

Question 8

Which of the following compounds is insoluble in water?

Accepted Answer

$$PbI_2$$

Question 9

Which of the following is the correct net ionic equation for the neutralization of $$HNO_3$$ with NaOH?

Accepted Answer

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

Question 10

Which of the following is a correct statement about strong acids?

Accepted Answer

They are completely ionized in aqueous solution.

Question 11

A student needs to prepare 250.0 mL of a 0.100 M NaCl solution. How many grams of NaCl are required? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

$$1.46\ \mathrm{g}$$

Question 12

Which of the following is the correct molecular equation for the reaction between aqueous solutions of Ba($$NO_3)_2 $$and Na_2SO_4?

Accepted Answer

$$\mathrm{Ba(NO_3$)_2(aq) + Na_2SO_4(aq) \rightarrow $$BaSO_4$$(s) + 2NaNO_3(aq)}$$

Question 13

Which of the following is a correct classification for $$NH_3(aq$$)?

Accepted Answer

Weak base and weak electrolyte

Question 14

Which of the following best describes the oxidation and reduction in the reaction: $$\mathrm{Zn(s) + Cu$$^{2+}$$(aq) \rightarrow Zn$$^{2+}$$(aq) + Cu(s)}$$?

Accepted Answer

Zn is oxidized and $$Cu^{2+} is $$reduced.

Question 15

A 50.0 mL sample of 0.200 M HCl is titrated with 0.100 M NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$100.\ \mathrm{mL}$$

Question 16

Which of the following is the correct net ionic equation for the reaction of Na_2CO_3(aq) with HCl(aq)?

Accepted Answer

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

Question 17

Which of the following best describes a spectator ion?

Accepted Answer

An ion that does not participate in the chemical reaction and remains unchanged in solution.

Question 18

Which of the following is the correct formula for the conjugate base of $$HCO_3$$^-?

Accepted Answer

$$\mathrm{CO_3$^{2-}}$$

Question 19

Which of the following statements about the pH scale is correct?

Accepted Answer

A solution with pH  7 is basic.

Aqueous Reactions, Electrolytes, and Solution Chemistry: Study Notes

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