Question 1

Which of the following best describes the limiting reactant in a chemical reaction?

Accepted Answer

The reactant that determines the maximum amount of product that can be formed.

Question 2

A student mixes 50.0 mL of 0.200 M NaCl with 50.0 mL of 0.200 M AgNO$$_3. $$What is the concentration of Ag$$^+$$ ions remaining in solution after the reaction is complete? (Assume AgCl is insoluble.)

Accepted Answer

$$0.000\ \mathrm{M}$$

Question 3

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

Accepted Answer

NaCl

Question 4

What is the net ionic equation for the reaction between aqueous solutions of Na$$_2SO$_4$$ and BaCl$$_2$$?

Accepted Answer

$$\mathrm{SO}_4$$^{2-}$$(aq) + \mathrm{Ba}^{2+}(aq) \rightarrow \mathrm{BaSO}_4(s)$$

Question 5

A solution is prepared by diluting 25.0 mL of 6.00 M HCl to a final volume of 500.0 mL. What is the final concentration of HCl?

Accepted Answer

$$0.750\ \mathrm{M}$$

Question 6

Which of the following statements about oxidation numbers is correct?

Accepted Answer

The oxidation number of an element in its standard state is $$0.$$

Question 7

Which of the following reactions is a redox reaction?

Accepted Answer

$$2\mathrm{H}_2(g) + \mathrm{O}_2(g) \rightarrow 2\mathrm{H}_2\mathrm{O}(l)$$

Question 8

A 10.0 g sample of CaCO$$_3 is $$heated and decomposes according to the equation: $$\mathrm{CaCO}_3(s) \rightarrow \mathrm{CaO}(s) + \mathrm{CO}_2(g). $$What is the theoretical yield of CO$$_2 (in $$grams)? (Molar masses: CaCO$$_3 = 100.1 g/$$mol, CO$$_2 = 44.0 g/$$mol)

Accepted Answer

$$4.40\ \mathrm{g}$$

Question 9

Which of the following best describes a spectator ion?

Accepted Answer

An ion that is unchanged on both sides of a total ionic equation.

Question 10

A student titrates 25.00 mL of 0.100 M H$$_2SO$_4$$ with 0.200 M NaOH. What volume of NaOH (in mL) is required to reach the equivalence point? (Reaction: $$\mathrm{H}_2\mathrm{SO}_4 + 2\mathrm{NaOH} \rightarrow 2\mathrm{H}_2\mathrm{O} + \mathrm{Na}_2\mathrm{SO}_4)$$

Accepted Answer

$$50.00\ \mathrm{mL}$$

Question 11

Which of the following is the correct balanced molecular equation for the reaction between aqueous solutions of Pb(NO$$_3$$)$$_2$$ and KI?

Accepted Answer

$$\mathrm{Pb(NO}_3)_2(aq) + 2\mathrm{KI}(aq) \rightarrow 2\mathrm{KNO}_3(aq) + \mathrm{PbI}_2(s)$$

Question 12

Which of the following best describes a non-electrolyte?

Accepted Answer

A substance that dissolves in water to form a solution that does not conduct electricity.

Question 13

What is the percent yield if 3.00 g of product is obtained from a reaction with a theoretical yield of 4.00 g?

Accepted Answer

$$75\%$$

Question 14

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

Accepted Answer

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

Question 15

Which of the following best describes the process of dissociation for Na$$_2SO$_4 in $$water?

Accepted Answer

$$\mathrm{Na}_2\mathrm{SO}_4(s) \rightarrow 2\mathrm{Na}^+(aq) + \mathrm{SO}_4$$^{2-}$$(aq)$$

Question 16

Which of the following is the correct oxidation number for sulfur in SO$$_2$$?

Accepted Answer

$$+4$$

Question 17

A reaction produces 5.00 g of product, but the theoretical yield is 8.00 g. What is the percent yield?

Accepted Answer

$$62.5\%$$

Question 18

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which an insoluble solid forms when two solutions are mixed.

Question 19

Which of the following is a combination reaction?

Accepted Answer

$$2\mathrm{H}_2(g) + \mathrm{O}_2(g) \rightarrow 2\mathrm{H}_2\mathrm{O}(l)$$

General Chemistry: Chemical Reactions and Aqueous Solutions (Chapters 4 & 5) Study Guide

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