Q: Which of the following is the correct net ionic equation for the reaction between aqueous solutions of sodium chloride and silver nitrate?

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

Q: Which of the following best describes a Brønsted-Lowry acid?

A substance that donates a proton ($$\text{H}^+) in a $$reaction.

Q: Which of the following reactions is a redox reaction?

$$2\text{Na} + 2\text{H}_2\text{O} \rightarrow 2\text{NaOH} + \text{H}_2$$

Q: A solution is prepared by dissolving 0.5 mol of $$\text{KBr} in $$water. Which of the following best describes the resulting solution?

A strong electrolyte solution containing $$\text{K}^+$$ and $$\text{Br}^-$$ ions.

Q: Which of the following is the correct net ionic equation for the reaction of hydrochloric acid with sodium hydroxide?

$$\text{H}^+ (aq) + \text{OH}^- (aq) \rightarrow \text{H}_2\text{O} (l)$$

Q: Which of the following is a combination (synthesis) reaction?

$$2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$$

Question 1

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which two aqueous solutions combine to form an insoluble solid.

Question 2

Given the balanced equation: $$2	ext{Al} + 3	ext{CuSO}_4 ightarrow 3	ext{Cu} + 	ext{Al}_2	ext{(SO}_4)_3$$, how many moles of copper are produced when 4 moles of aluminum react completely?

Accepted Answer

$$6$$ moles

Question 3

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of sodium chloride and silver nitrate?

Accepted Answer

$$	ext{Ag}^+ (aq) + 	ext{Cl}^- (aq) ightarrow 	ext{AgCl} (s)$$

Question 4

A student mixes 50.0 g of $$	ext{Na}_2	ext{SO}_4$$ with 50.0 g of $$	ext{BaCl}_2. $$The balanced equation is $$	ext{Na}_2	ext{SO}_4 + 	ext{BaCl}_2 ightarrow 2	ext{NaCl} + 	ext{BaSO}_4. $$Which reactant is the limiting reagent?

Accepted Answer

$$	ext{BaCl}_2$$

Question 5

Which of the following statements about strong electrolytes is correct?

Accepted Answer

They dissociate completely into ions in aqueous solution.

Question 6

What is the oxidation number of sulfur in $$	ext{H}_2	ext{SO}_4$$?

Accepted Answer

$$+6$$

Question 7

Which of the following best describes a Brønsted-Lowry acid?

Accepted Answer

A substance that donates a proton ($$	ext{H}^+) in a $$reaction.

Question 8

Which of the following reactions is a redox reaction?

Accepted Answer

$$2	ext{Na} + 2	ext{H}_2	ext{O} ightarrow 2	ext{NaOH} + 	ext{H}_2$$

Question 9

A solution is prepared by dissolving 0.5 mol of $$	ext{KBr} in $$water. Which of the following best describes the resulting solution?

Accepted Answer

A strong electrolyte solution containing $$	ext{K}^+$$ and $$	ext{Br}^-$$ ions.

Question 10

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

Accepted Answer

$$	ext{H}^+ (aq) + 	ext{OH}^- (aq) ightarrow 	ext{H}_2	ext{O} (l)$$

Question 11

If 10.0 g of $$	ext{CaCO}_3 is $$decomposed by heating, what is the theoretical yield of $$	ext{CO}_2 (in $$grams) produced? ($$	ext{CaCO}_3 ightarrow 	ext{CaO} + 	ext{CO}_2$$, molar mass $$	ext{CaCO}_3 = 100 g/$$mol, $$	ext{CO}_2 = 44 g/$$mol)

Accepted Answer

$$4.4 g$$

Question 12

Which of the following best explains why $$	ext{NaCl} is a $$strong electrolyte?

Accepted Answer

It dissociates completely into ions in water, allowing the solution to conduct electricity well.

Question 13

Which of the following is a combination (synthesis) reaction?

Accepted Answer

$$2	ext{H}_2 + 	ext{O}_2 ightarrow 2	ext{H}_2	ext{O}$$

Question 14

A student calculates a percent yield of 120% for a reaction. What is the most likely explanation?

Accepted Answer

The product was not completely dried before weighing.

Question 15

Which of the following is the correct oxidation half-reaction for the reaction $$	ext{Zn} + 	ext{Cu}^{2+} ightarrow 	ext{Zn}^{2+} + 	ext{Cu}$$?

Accepted Answer

$$	ext{Zn} ightarrow 	ext{Zn}^{2+} + 2e^-$$

Question 16

Which of the following best describes the role of water in the reaction $$	ext{NH}_3 + 	ext{H}_2	ext{O} ightarrow 	ext{NH}_4^+ + 	ext{OH}^-$$?

Accepted Answer

Water acts as a Brønsted-Lowry acid.

Question 17

Which of the following is a correct statement about the solubility rules?

Accepted Answer

All nitrates ($$	ext{NO}_3^-) $$are soluble in water.

Question 18

A reaction has the following balanced equation: $$2	ext{Fe} + 3	ext{Cl}_2 ightarrow 2	ext{FeCl}_3. If $$you start with 5.0 g of $$	ext{Fe}$$ and excess $$	ext{Cl}_2$$, what is the theoretical yield of $$	ext{FeCl}_3 ($$molar mass $$	ext{Fe} = 56 g/$$mol, $$	ext{FeCl}_3 = 162.5 g/$$mol)?

Accepted Answer

$$14.5 g$$

Question 19

Which of the following best describes a double displacement (metathesis) reaction?

Accepted Answer

Two compounds exchange ions to form two new compounds.

General Chemistry Study Guide: Chemical Reactions, Stoichiometry, and Aqueous Solutions

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