Question 1

Which of the following best describes a concentrated solution?

Accepted Answer

A solution with a relatively large amount of solute compared to solvent.

Question 2

What is the molarity of a solution prepared by dissolving 29.2 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 500.0 mL of solution?

Accepted Answer

$$1.00\ \mathrm{M}$$

Question 3

Which of the following statements about electrolytes is TRUE?

Accepted Answer

A strong electrolyte completely dissociates into ions in water.

Question 4

A student prepares a solution by dissolving 0.250 mol of KBr in enough water to make 750 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.333\ \mathrm{M}$$

Question 5

Which of the following ions is a spectator ion in the reaction: $$\mathrm{$$AgNO_3$$(aq) + KBr(aq) \rightarrow AgBr(s) + $$KNO_3$$(aq)}$$?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 6

What is the net ionic equation for the reaction between aqueous solutions of Na2SO4 and BaCl2?

Accepted Answer

$$\mathrm{Ba$$^{2+}$$(aq) + SO_4$^{2-}(aq) \rightarrow $$BaSO_4$$(s)}$$

Question 7

A 25.0 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

$$50.0\ \mathrm{mL}$$

Question 8

Which of the following compounds is always soluble in water?

Accepted Answer

$$\mathrm{$$NaNO_3$$}$$

Question 9

Which of the following best describes the process of dissolving NaCl in water?

Accepted Answer

Na+ and Cl- ions are pulled apart and surrounded by water molecules.

Question 10

A solution is prepared by diluting 50.0 mL of 6.00 M HCl to a final volume of 300.0 mL. What is the final concentration?

Accepted Answer

$$1.00\ \mathrm{M}$$

Question 11

Which of the following is a correct balanced molecular equation for the reaction between aqueous solutions of potassium carbonate and hydrochloric acid?

Accepted Answer

$$\mathrm{K_2CO_3(aq) + 2HCl(aq) \rightarrow 2KCl(aq) + H_2O(l) + CO_2$(g)}$$

Question 12

Which of the following best explains why sugar solutions do not conduct electricity?

Accepted Answer

Sugar molecules remain intact and do not form ions in water.

Question 13

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of HCl and NaOH?

Accepted Answer

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

Question 14

A 20.0 mL sample of H2SO4 is titrated to equivalence with 40.0 mL of 0.100 M NaOH. What is the concentration of the H2SO4 solution?

Accepted Answer

$$0.100\ \mathrm{M}$$

Question 15

Which of the following is a redox reaction?

Accepted Answer

$$\mathrm{Zn(s) + 2AgNO_3(aq) \rightarrow Zn(NO_3$)_2(aq) + 2Ag(s)}$$

Question 16

What is the oxidation state of sulfur in $$\mathrm{SO_4$^{2-}}$$?

Accepted Answer

$$+6$$

Question 17

Which of the following statements about redox reactions is TRUE?

Accepted Answer

Oxidation and reduction must occur simultaneously.

Question 18

A solution is prepared by mixing 100.0 mL of 0.200 M Na2SO4 with 100.0 mL of 0.100 M BaCl2. What mass of BaSO4 (molar mass = 233.39 g/mol) will precipitate?

Accepted Answer

$$1.17\ \mathrm{g}$$

Solutions and Aqueous Reactions: Concentration, Solubility, and Electrolytes

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