Question 1

Which of the following best describes the process that occurs when HCl is dissolved in water, according to the Arrhenius definition?

Accepted Answer

HCl ionizes to produce H3O+ and Cl- ions.

Question 2

Which equation represents the general ionization of an Arrhenius acid in water?

Accepted Answer

$$\mathrm{HA + H_2O \rightarrow A^- + H_3O^+}$$

Question 3

Which of the following substances is amphoteric, able to act as both an acid and a base in Bronsted-Lowry reactions?

Accepted Answer

H2O

Question 4

A student mixes Ba(s) with H2SO4(aq) and observes the formation of a white precipitate and gas bubbles. Which gas is produced, and what is the balanced equation for the reaction?

Accepted Answer

Hydrogen gas; $$\mathrm{Ba(s) + H_2SO_4(aq) \rightarrow $$BaSO_4$$(s) + H_2$(g)}$$

Question 5

Which property is shared by both acids and bases when dissolved in water?

Accepted Answer

They both form electrolytes and conduct electricity.

Question 6

Which of the following reactions demonstrates the Bronsted-Lowry concept of proton transfer, with water acting as the acid?

Accepted Answer

$$\mathrm{NH_3$ + H_2O \rightarrow NH_4$^+ + OH^-}$$

Question 7

Which of the following is a correct general equation for the dissociation of an Arrhenius base?

Accepted Answer

$$\mathrm{BOH \rightarrow B^+ + OH^-}$$

Question 8

A solution of NaOH feels slippery to the touch. Which property of bases does this illustrate?

Accepted Answer

Bases feel slippery when diluted.

Question 9

Which of the following reactions is a neutralization reaction?

Accepted Answer

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

Question 10

Which of the following statements about acids is FALSE?

Accepted Answer

Acids turn pH paper blue.

Question 11

A student tests a solution with pH paper and observes a blue color. Which of the following is most likely present in the solution?

Accepted Answer

A strong base

Question 12

Which of the following best explains why acids and bases conduct electricity in solution?

Accepted Answer

They form electrolytes by producing ions in solution.

Question 13

Which of the following is a correct example of an Arrhenius base that does NOT contain hydroxide ions initially, but produces them upon reaction with water?

Accepted Answer

NH3

Question 14

Which of the following reactions demonstrates the formation of a salt and water from an acid-base neutralization?

Accepted Answer

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

Question 15

Which of the following best describes the role of NH3 in the reaction $$\mathrm{NH_3$ + H_2O \rightarrow NH_4$^+ + OH^-}$$ according to Bronsted-Lowry theory?

Accepted Answer

NH3 is a proton acceptor.

Question 16

A student observes that a solution turns pH paper red and reacts with CaCO3 to produce bubbles. Which type of substance is most likely present?

Accepted Answer

An acid

Question 17

Which of the following is a plausible reason why the Arrhenius definition of acids and bases is considered oversimplified?

Accepted Answer

It only applies to reactions in aqueous solutions and does not account for proton transfer in non-aqueous environments.

Question 18

Which of the following reactions illustrates the formation of carbon dioxide from an acid reacting with a carbonate?

Accepted Answer

$$\mathrm{2HC_2H_3O_2(aq) + $$CaCO_3$$(s) \rightarrow CO_2$(g) + H_2O(l) + Ca(C_2H_3O_2)_2(aq)}$$

Question 19

Which of the following statements about Bronsted-Lowry acids and bases is correct?

Accepted Answer

A Bronsted-Lowry acid is a proton donor.

Acid-Base Chemistry: Definitions, Reactions, and Properties

Guida di studio - Domande di pratica

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