Question 1

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

Accepted Answer

A species that donates a proton ($$H^+) to $$another species.

Question 2

In the reaction $$HF_{(aq)} + SO_3$^{2-}_{(aq)} \rightleftharpoons F^-_{(aq)} + $$HSO_3$$^-_{(aq)}$$, which reactant acts as the Brønsted-Lowry base?

Accepted Answer

$$SO_3$$^{2-}_{(aq)}$$

Question 3

Which of the following is a correct example of a monoprotic acid?

Accepted Answer

$$HNO_3_{(aq)}$$

Question 4

A student mixes $$CH_3COOH_{(aq)}$$ and $$CO_3$$^{2-}_{(aq)}$$. Which statement is true about the role of CH_3$$COOH_{(aq)}$$ in this reaction?

Accepted Answer

$$CH_3COOH_{(aq)}$$ acts as a Brønsted-Lowry acid because it donates a proton.

Question 5

Which of the following substances can act as a Brønsted-Lowry base?

Accepted Answer

$$NaHCO_3_{(aq)}$$

Question 6

Which of the following acids is triprotic?

Accepted Answer

$$H_3PO_4_{(aq)}$$

Question 7

In the reaction $$HCO_3$$^-_{(aq)} + $$HSO_4$$^-_{(aq)} \rightleftharpoons $$SO_4$$^{2-}_{(aq)} + H_2CO_3_{(aq)}$$, which species is the Brønsted-Lowry acid?

Accepted Answer

$$HSO_4$$^-_{(aq)}$$

Question 8

Which statement correctly distinguishes between a monoprotic and a polyprotic acid?

Accepted Answer

A monoprotic acid can donate only one proton per molecule, while a polyprotic acid can donate more than one proton per molecule.

Question 9

Which of the following organic acids is diprotic?

Accepted Answer

Oxalic acid ($$HOOCCOOH)$$

Question 10

In the reaction $$H_3PO_4_{(aq)} + OCl^-_{(aq)} \rightleftharpoons H_2PO_4^-_{(aq)} + HOCl_{(aq)}$$, what is the role of $$OCl^-_{(aq)}$$?

Accepted Answer

Brønsted-Lowry base

Question 11

Which of the following is NOT a Brønsted-Lowry acid?

Accepted Answer

$$NaCl_{(aq)}$$

Question 12

A solution contains $$H_2CO_3_{(aq)}. $$How many protons can this acid donate in separate steps?

Accepted Answer

Two

Question 13

Which of the following best describes the difference between a Brønsted-Lowry base and a Lewis base?

Accepted Answer

A Brønsted-Lowry base accepts a proton, while a Lewis base donates an electron pair to form a bond.

Question 14

Which of the following reactions demonstrates a polyprotic acid donating its second proton?

Accepted Answer

$$HSO_4$$^-_{(aq)} \rightarrow H^+_{(aq)} + $$SO_4$$^{2-}_{(aq)}$$

Question 15

Which of the following is a correct rule to distinguish an acid from an alcohol in organic chemistry?

Accepted Answer

Acids contain a $$COOH$$ group, while alcohols contain an $$OH$$ group attached to a carbon atom.

Question 16

Which of the following is true about the conjugate base formed when $$HNO_3_{(aq)}$$ donates a proton?

Accepted Answer

The conjugate base is $$NO_3$$^-_{(aq)}$$

Question 17

Which of the following is a real-world example of a Brønsted-Lowry acid-base reaction?

Accepted Answer

The neutralization of stomach acid ($$HCl) by $$antacids containing $$NaHCO_3$$

Question 18

Which of the following statements about $$H_3PO_4_{(aq)} is $$correct?

Accepted Answer

$$H_3PO_4_{(aq)}$$ can donate three protons in separate steps.

Question 19

Which of the following is the correct Brønsted-Lowry acid in the reaction $$HCl_{(aq)} + NH_3_{(aq)} \rightarrow NH_4Cl_{(aq)}$$?

Accepted Answer

$$HCl_{(aq)}$$

Brønsted-Lowry Acids and Bases: Concepts, Classification, and Examples

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