Question 1

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

Accepted Answer

A reaction where a solid product forms and separates from the solution.

Question 2

Given the reaction $$\mathrm{KI_{(aq)} + Pb(NO_3$)_2_{(aq)} \rightarrow 2KNO_3_{(aq)} + PbI_2_{(s)}}$$, which compound is the precipitate?

Accepted Answer

$$\mathrm{$$PbI_2$$}$$

Question 3

Which statement about the complete ionic equation is correct?

Accepted Answer

It splits all aqueous compounds into their ions.

Question 4

What is the net ionic equation for the reaction $$\mathrm{KI_{(aq)} + Pb(NO_3$)_2_{(aq)} \rightarrow 2KNO_3_{(aq)} + PbI_2_{(s)}}$$?

Accepted Answer

$$\mathrm{2I^-_{(aq)} + Pb$$^{2+}$$_{(aq)} \rightarrow PbI_2_{(s)}}$$

Question 5

Which property of water is primarily responsible for its ability to dissolve ionic compounds?

Accepted Answer

Its polarity and ability to form electrostatic interactions

Question 6

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

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 7

A student dissolves 23.5 g of NaCl in enough water to make 500.0 mL of solution. What is the molarity ($$M) of $$the solution? ($$\mathrm{M_{NaCl} = 58.44\ g/mol})$$

Accepted Answer

$$0.803\ M$$

Question 8

Which of the following statements about molarity ($$M) $$and molality ($$m) is $$correct?

Accepted Answer

Molality is based on the mass of solvent, not the volume of solution.

Question 9

Which of the following is a correct use of the dilution equation $$M_1V_1 = M_2V_2$$?

Accepted Answer

To determine the volume of stock solution required to prepare a diluted solution.

Question 10

A laboratory technician needs to prepare 100.0 mL of 0.100 M CuSO$$_4$$ solution from a 10.00 M stock. What volume of stock solution should be used?

Accepted Answer

$$1.00\ mL$$

Question 11

Which of the following is a weak electrolyte?

Accepted Answer

Ammonia ($$\mathrm{NH_3$})$$

Question 12

Which of the following is NOT a requirement for a solution to conduct electricity?

Accepted Answer

Solvent must be water

Question 13

Which of the following is a nonelectrolyte?

Accepted Answer

Ethanol ($$\mathrm{C_2H_5OH})$$

Question 14

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture that is uniform at the molecular level.

Question 15

Which of the following is a correct molecular equation for a gas-forming reaction?

Accepted Answer

$$\mathrm{NaHCO_3_{(aq)} + HCl_{(aq)} \rightarrow NaCl_{(aq)} + H_2O_{(l)} + CO_2_{(g)}}$$

Question 16

Which of the following is a correct net ionic equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$\mathrm{H^+_{(aq)} + OH^-_{(aq)} \rightarrow H_2O_{(l)}}$$

Question 17

Which of the following acids is diprotic?

Accepted Answer

Sulfuric acid ($$\mathrm{H_2SO_4})$$

Question 18

Which of the following best explains why strong acids are strong electrolytes?

Accepted Answer

They fully dissociate into ions in water.

Question 19

A hydrate is best described as:

Accepted Answer

A compound that contains water molecules incorporated into its structure.

Reactions in Aqueous Solutions: Precipitation, Ionic Equations, and Solution Chemistry

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