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 $CH_3COOH_{(aq)}$ 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

Study Guide - Practice Questions