Question 1

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

Accepted Answer

A substance that donates an $$H^+$$ ion.

Question 2

Which of the following is the correct balanced equation for the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$HCl + NaOH \rightarrow NaCl + H_2O$$

Question 3

Which of the following pairs are conjugate acid-base pairs?

Accepted Answer

$$NH_3$$ and $$NH_4$$^+$$

Question 4

Which of the following is NOT one of the six common strong acids?

Accepted Answer

$$HNO_2$$

Question 5

What is the conjugate base of $$HNO_3$$ after it donates a proton to water?

Accepted Answer

$$NO_3$$^-$$

Question 6

Which statement best describes the amphoteric nature of water?

Accepted Answer

Water can act as either an acid or a base depending on the reaction partner.

Question 7

A student mixes $$HBr$$ and $$KOH in a $$beaker. What are the products of this reaction?

Accepted Answer

$$KBr$$ and $$H_2O$$

Question 8

Which of the following equations represents the ionization of a strong acid in water?

Accepted Answer

$$HCl + H_2O \rightarrow H_3O^+ + Cl^-$$

Question 9

In the reaction $$NH_3 + H_2O$$ \rightleftharpoons $$NH_4^+ + OH$$^-$$, which species acts as the acid?

Accepted Answer

$$H_2O$$

Question 10

Which of the following best explains why $$H_2SO_4 is $$considered a strong acid?

Accepted Answer

It completely donates its protons to water, resulting in nearly 100% dissociation.

Question 11

A solution contains $$0.10 M$$ $$HCl. $$What is the concentration of $$H_3O^+ in $$the solution?

Accepted Answer

$$0.10 M$$

Question 12

Which of the following is the correct conjugate acid-base pair for the reaction $$H_2O + $$HSO_4$$^- \rightleftharpoons H_3O^+ + SO_4$^{2-}$$?

Accepted Answer

$$HSO_4$$^-$$ / SO_4$^{2-}$$

Question 13

If $$0.025$$ mol of $$NaOH is $$added to $$50.0 mL of$$ $$0.50 M$$ $$HCl$$, what is the resulting pH? (Assume total volume is additive and $$HCl is a $$strong acid.)

Accepted Answer

pH = 0.30

Question 14

Which of the following statements about neutralization reactions is correct?

Accepted Answer

They involve the reaction of an acid and a base to form water and a salt.

Question 15

Which of the following is the correct Bronsted-Lowry reaction for $$HNO_3 in $$water?

Accepted Answer

$$HNO_3 + H_2O$$ \rightarrow $$NO_3^- + H_3O$$^+$$

Question 16

Which of the following best describes the relationship between $$H_2O$$ and $$OH^- in $$the context of acid-base chemistry?

Accepted Answer

$$H_2O is $$the conjugate acid of $$OH^-.$$

Question 17

A student claims that $$NH_3 is a $$strong base because it produces $$OH^- in $$water. Which of the following best evaluates this claim?

Accepted Answer

$$NH_3 is a $$weak base because it only partially reacts with water to produce $$OH^-.$$

Question 18

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

Accepted Answer

A conjugate acid is formed when a base gains a proton.

Question 19

Which of the following best explains why $$H_2O$$ can act as both an acid and a base?

Accepted Answer

Because it can both donate and accept a proton depending on the reaction partner.

Question 20

In the reaction $$HClO_4 + H_2O$$ \rightarrow H_3O^+ + $$ClO_4$$^-$$, what is the conjugate base?

Accepted Answer

$$ClO_4$$^-$$

Acids, Bases, and Neutralization: Key Concepts in General Chemistry

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