Question 1

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

Accepted Answer

A substance that completely dissociates into ions in solution.

Question 2

You are given 10.0 g of NaCl and asked to prepare a 0.50 M solution. What is the minimum volume of water (in liters) you must use to dissolve all the NaCl?

Accepted Answer

$$0.34$$

Question 3

Which of the following compounds will form a precipitate when mixed with a solution of $$\mathrm{$$AgNO_3$$}$$?

Accepted Answer

$$\mathrm{NaCl}$$

Question 4

What is the net ionic equation for the reaction between aqueous solutions of $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$}$$?

Accepted Answer

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

Question 5

A student titrates 25.0 mL of $$0.100\ \mathrm{M}$$ HCl with $$0.200\ \mathrm{M}$$ NaOH. What volume of NaOH is required to reach the equivalence point?

Accepted Answer

$$12.5\ \mathrm{mL}$$

Question 6

Which of the following is a correct balanced molecular equation for the neutralization of sulfuric acid with potassium hydroxide?

Accepted Answer

$$\mathrm{H_2SO_4 (aq) + 2KOH (aq) \rightarrow 2H_2O (l) + K_2SO_4 (aq)}$$

Question 7

Which of the following statements about oxidation-reduction (redox) reactions is correct?

Accepted Answer

Oxidation is the loss of electrons and reduction is the gain of electrons.

Question 8

Which of the following species is the oxidizing agent in the reaction: $$\mathrm{Zn (s) + Cu$$^{2+}$$ (aq) \rightarrow Zn$$^{2+}$$ (aq) + Cu (s)}$$?

Accepted Answer

$$\mathrm{Cu$$^{2+}$$ (aq)}$$

Question 9

A solution is prepared by dissolving 5.00 g of glucose ($$\mathrm{C_6H_{12}O_6$}) in $$enough water to make 100.0 mL of solution. What is the molarity of the solution? (Molar mass of glucose = $$180\ \mathrm{g/mol})$$

Accepted Answer

$$0.278\ \mathrm{M}$$

Question 10

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which an insoluble solid forms from the mixing of two solutions.

Question 11

Which of the following is a correct net ionic equation for the reaction between aqueous solutions of $$\mathrm{HCl}$$ and $$\mathrm{NaOH}$$?

Accepted Answer

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

Question 12

Which of the following is a weak electrolyte?

Accepted Answer

$$\mathrm{CH_3COOH} ($$acetic acid)

Question 13

Which of the following best explains why $$\mathrm{Na_2SO_4} is $$soluble in water?

Accepted Answer

All sodium salts are soluble in water.

Question 14

A student mixes solutions of $$\mathrm{Pb(NO_3$)_2}$$ and $$\mathrm{KI}. $$Which of the following observations would indicate a chemical reaction has occurred?

Accepted Answer

A yellow solid forms.

Question 15

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

Accepted Answer

$$+6$$

Question 16

Which of the following reactions is a single displacement (single replacement) reaction?

Accepted Answer

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

Question 17

Which of the following best describes the equivalence point in a titration?

Accepted Answer

The point at which the amount of acid equals the amount of base in moles.

Question 18

Which of the following is a correct total ionic equation for the reaction of $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$} in $$aqueous solution?

Accepted Answer

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

Question 19

Which of the following best describes a combination (synthesis) reaction?

Accepted Answer

A reaction in which two or more substances combine to form a single product.

General Chemistry Study Guide: Solutions, Electrolytes, Reactions, and Stoichiometry

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