Question 1

Which of the following statements best describes the difference between Arrhenius and Brønsted–Lowry definitions of acids and bases?

Accepted Answer

Arrhenius acids increase hydrogen ion concentration in water, while Brønsted–Lowry acids are proton donors.

Question 2

Which of the following equations correctly represents the ionization of sulfuric acid ($$H_2SO_4) in $$water?

Accepted Answer

$$H_2SO_4 (aq) \rightarrow 2H^+ (aq) + SO_4$^{2-} (aq)$$

Question 3

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-9}$$ M. What is its pH?

Accepted Answer

pH = 9

Question 4

Which of the following compounds is a strong acid?

Accepted Answer

H_2SO_4

Question 5

What is the product when selenium dioxide ($$SeO_2) $$reacts with water?

Accepted Answer

$$H_2SeO_3$$

Question 6

Which of the following would create a basic solution when added to water?

Accepted Answer

MgO

Question 7

A buffer solution is best described as:

Accepted Answer

A solution containing a weak acid and its conjugate base that resists changes in pH.

Question 8

Which of the following is the correct formula for the base formed by the addition of water to barium oxide ($$BaO$$)?

Accepted Answer

$$Ba(OH)_2$$

Question 9

What are the products of the neutralization reaction: $$H_3PO_4 + 3KOH \rightarrow$$ ?

Accepted Answer

$$K_3PO_4 + 3H_2O$$

Question 10

Which of the following best describes a Brønsted–Lowry base?

Accepted Answer

A proton acceptor

Question 11

Which of the following is the conjugate base of $$H_2CO_3$$?

Accepted Answer

$$HCO_3$$^-$$

Question 12

A solution with a pH of 2 is considered:

Accepted Answer

Very acidic

Question 13

Which of the following best explains why ammonia ($$NH_3) is $$considered a base according to the Brønsted–Lowry definition?

Accepted Answer

It accepts a proton from water to form $$NH_4$$^+$$.

Question 14

Which of the following is a real-world example of a neutralization reaction?

Accepted Answer

Taking an antacid to relieve heartburn

Question 15

What is the hydrogen ion concentration of a solution with a pH of 3?

Accepted Answer

$$1 	imes 10$$^{-3}$$ M

Question 16

Which of the following substances is commonly used as an antacid to neutralize stomach acid?

Accepted Answer

Sodium bicarbonate ($$NaHCO_3)$$

Question 17

Which of the following best describes the effect of acid rain on the environment?

Accepted Answer

It lowers the pH of lakes and streams, harming aquatic life.

Question 18

Which of the following is the conjugate acid of $$NH_3$$?

Accepted Answer

$$NH_4$$^+$$

Question 19

If a solution turns blue litmus paper red, what can you conclude about the solution?

Accepted Answer

It is acidic.

Question 20

Which of the following best describes a salt in chemistry?

Accepted Answer

An ionic compound composed of cations other than hydrogen and anions other than hydroxide.

Acids and Bases: Properties, Definitions, and Applications

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