Question 1

Which of the following statements correctly describes the behavior of soluble ionic and covalent compounds in water?

Accepted Answer

Soluble ionic solids dissociate into their ions in water, while soluble covalent compounds remain as molecules.

Question 2

Which of the following is a strong acid that completely dissociates in water?

Accepted Answer

$$\mathrm{$$HNO_3$$}$$

Question 3

What is the net ionic equation for the reaction between aqueous hydrochloric acid and lithium hydroxide?

Accepted Answer

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

Question 4

A 25.00 mL sample of $$\mathrm{H_2SO_4} of $$unknown concentration is titrated with 0.1837 M $$\mathrm{KOH}. If 31.73 mL of $$the $$\mathrm{KOH}$$ solution are required to neutralize the sample, what is the molarity of the $$\mathrm{H_2SO_4}$$?

Accepted Answer

$$0.1166\ \mathrm{M}$$

Question 5

Which of the following is the correct balanced molecular equation for the reaction of acetic acid with sodium hydroxide?

Accepted Answer

$$\mathrm{CH_3CO_2H(aq) + NaOH(aq) \rightarrow NaCH_3CO_2(aq) + H_2O(l)}$$

Question 6

Which of the following is a weak base that partially dissociates in water?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 7

During a redox reaction, which species is the reducing agent?

Accepted Answer

The species that is oxidized and loses electrons.

Question 8

Assign oxidation numbers to each atom in $$\mathrm{H_2O}$$ and $$\mathrm{Na} in $$the reaction $$2\mathrm{Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2$(g)}. $$Which element is oxidized?

Accepted Answer

Sodium, because its oxidation number increases from 0 to +1.

Question 9

Which of the following is the correct net ionic equation for the neutralization of a strong acid with a strong base?

Accepted Answer

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

Question 10

Which of the following is a correct statement about acid-base titrations?

Accepted Answer

At the equivalence point, the number of moles of strong acid equals the number of moles of strong base.

Question 11

Which of the following is the correct half-reaction for the oxidation of calcium in the reaction $$\mathrm{Ca(s) + Br_2$(l) \rightarrow $$CaBr_2$$(s)}$$?

Accepted Answer

$$\mathrm{Ca \rightarrow Ca$$^{2+}$$ + 2e^-}$$

Question 12

Which of the following is NOT a strong base?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 13

What is the oxidation number of oxygen in hydrogen peroxide ($$\mathrm{H_2O_2}$$)?

Accepted Answer

$$-1$$

Question 14

Which of the following is the correct procedure for balancing a redox reaction in acidic solution?

Accepted Answer

Balance all atoms except H and O, then balance O by adding $$\mathrm{H_2O}$$, H by adding $$\mathrm{H^+}$$, and charge by adding $$\mathrm{e^-}.$$

Question 15

In the reaction $$\mathrm{$$MnO_4$$^-(aq) + 10Br^-(aq) + 16H^+(aq) \rightarrow 2Mn$$^{2+}$$(aq) + 5Br_2(l) + 8H_2O(l)}$$, which species is the oxidizing agent?

Accepted Answer

$$\mathrm{$$MnO_4$$^-}$$

Question 16

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

Accepted Answer

$$\mathrm{CH_3CO_2H(aq) + Na^+(aq) + OH^-(aq) \rightarrow Na^+(aq) + CH_3CO_2^-(aq) + H_2O(l)}$$

Question 17

Which of the following is true about the concentration of ions in a solution of a soluble ionic compound?

Accepted Answer

The concentration of ions can be different from the concentration of the compound due to dissociation.

Question 18

Which of the following is the correct formula for the hydronium ion?

Accepted Answer

$$\mathrm{H_3O^+}$$

Acid-Base and Oxidation-Reduction Reactions: General Chemistry Study Notes

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