Question 1

Which of the following is a correct Arrhenius definition of a base?

Accepted Answer

Any substance that produces hydroxide ions $$OH^- in $$aqueous solution.

Question 2

Which of the following acids is classified as a strong acid?

Accepted Answer

HNO$$_3 ($$nitric acid)

Question 3

What is the net ionic equation for the reaction between NaOH(aq) and NH$$_4Br(aq$$)?

Accepted Answer

$$OH^-(aq) + NH_4$^+(aq) \rightarrow NH_3$(g) + H_2O(l)$$

Question 4

Which of the following statements best describes a weak acid?

Accepted Answer

A weak acid partially ionizes in solution.

Question 5

Given the reaction: $$2HCl(aq) + Ba(OH)_2(aq) \rightarrow 2H_2O(l) + $$BaCl_2$$(aq)$$, what is the net ionic equation?

Accepted Answer

$$2H^+(aq) + 2OH^-(aq) \rightarrow 2H_2O(l)$$

Question 6

Which of the following compounds is a Group 2 metal hydroxide?

Accepted Answer

Ba(OH)$$_2$$

Question 7

In the reaction $$2Na(s) + Cl_2$(g) \rightarrow 2NaCl(s)$$, which species is oxidized?

Accepted Answer

Na

Question 8

What is the oxidation number of phosphorus in $$NH_4H_2PO_4$$?

Accepted Answer

+5

Question 9

Which of the following is the correct oxidation half-reaction for sodium in the reaction $$2Na(s) + Cl_2$(g) \rightarrow 2NaCl(s)$$?

Accepted Answer

$$2Na(s) \rightarrow 2Na^+(aq) + 2e^-$$

Question 10

Which statement about oxidation and reduction is correct?

Accepted Answer

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

Question 11

In the reaction $$8H^+ + $$MnO_4$$^- + 5Fe$$^{2+}$$ \rightarrow Mn$$^{2+}$$ + 5Fe$$^{3+}$$ + 4H_2O$$, which species is the oxidizing agent?

Accepted Answer

MnO$$_4^-$$

Question 12

Which rule is correct for assigning oxidation numbers?

Accepted Answer

Oxygen usually has an oxidation state of -2.

Question 13

Which of the following reactions is an example of an acid-base neutralization?

Accepted Answer

$$HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)$$

Question 14

Which of the following is a product of the reaction $$HCl(aq) + KHC_2O_3(aq)$$?

Accepted Answer

$$H_2O(l)$$

Question 15

In a redox reaction, the reducing agent:

Accepted Answer

Is oxidized by donating electrons.

Question 16

Which of the following is the correct net ionic equation for the reaction between KOH(aq) and HCN(aq)?

Accepted Answer

$$OH^-(aq) + HCN(aq) \rightarrow CN^-(aq) + H_2O(l)$$

Question 17

Which of the following best describes the change in oxidation state for oxygen in $$H_2O$$?

Accepted Answer

-2

Question 18

Which of the following is a strong base?

Accepted Answer

Ba(OH)$$_2$$

Question 19

Which of the following reactions involves gas formation as a product?

Accepted Answer

$$NH_4)_2SO_4(aq) + Ca(OH)_2(aq$$) \rightarrow 2NH_3(g) + 2H_2O(l) + $$CaSO_4(s$$)$$

CH 4-2: Chemical Reactions and Stoichiometry: Acid-Base and Redox Reactions

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