Chemistry - Chapter 14
What is the conjugate acid of OH⁻?
H2O
Which of the following is NOT an acid-base conjugate pair?
H2S and OH-
Which of the following acids is commonly used for manufacturing fertilizer?
HNO3
Which of the following is NOT true?
The Arrhenius Model of acids and bases applies toward substances that are nonaqueous.
Consider a 1.6 × 10-3 M solution of HNO3. Which of the following statements is NOT true?
This solution has a pH of 11.20.
In order for a solution to be basic,
[H3O+] < [OH-]
What is the [OH-] in a solution that has a pOH of 9.65?
2.2 × 10-10 M
What is the concentration of hydronium ions in a solution given that the concentration of hydroxide ions is 2.31 × 10-4 M?
4.33 × 10-11 M
What is the [H⁺] in a solution that has a pH of 3.35?
4.5 × 10-4 M
What is the pH of a solution that has a H⁺ concentration equal to 1.76 × 10-5 M?
4.77
What is the concentration of the hydroxide ion given that the concentration of the hydronium ion is 1.5 × 10-5 M?
6.7 × 10-10 M
What is the pOH of a solution that has a OH- concentration equal to1.36 × 10-10 M?
9.89
Ammonia (NH3) ionizes in water to form a basic solution. What is the concentration of OH- ions in a
< 0.75 M
What is the concentration of the hydroxide ions in an acidic solution?
< 1.0× 10-7 M
Which of the following is NOT a property of acids?
Acids have a slippery feel.
Which of the following statements about acids are TRUE? 1. An acid is used in car batteries. 2. The active ingredient of vinegar is an acid. 3. Acids are used for cleaning metals.
All of 1, 2, and 3
Which of the following is TRUE of alkaloid compounds?
All of the above are true.
Which of the following is NOT a property of bases?
Bases dissolve many metals.
In the following reaction: NH4+ (aq) + H2O (aq) → NH3 (aq) + H3O+ (aq)
H2O is a base and H3O+ is its conjugate acid.
In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq)
H2O is an acid and OH- is its conjugate base.
Which among the following acids is commonly used for etching and frosting glass?
Hydrofluoric acid
If the pH of an aqueous solution changed from 9.10 to 4.67, what happened to the hydronium ion concentration?
It increased.
The pH of a solution is 5.00. Which of the following is TRUE about the solution?
Its [H3O+] is 1.0 × 10-5 M
Which of the following common bases is commonly used for manufacturing fertilizer?
NH3
The Bronsted-Lowry definition of a base is:
a proton acceptor.
The Bronsted-Lowry definition of an acid is:
a proton donor.
A buffer solution is all of the following EXCEPT:
a solution that regulates pH by the addition of a strong acid or base.
A 0.10 M solution of an electrolyte has a pH of 4.5. The electrolyte is:
a weak acid.
Carboxylic acids can be found in
all of the above
Which of the following is a weak base?
ammonia
A substance that acts as an acid or a base is called
amphoteric.
Substances that can act both as an acid and as a base are called:
amphoteric.
Which of the following acids is a diprotic, weak acid?
carbonic acid
Which solution below has the highest concentration of hydroxide ions?
pH = 12.49
Which solution below is considered to have basic character?
pOH = 4
The Arrhenius definition of an acid is:
produces H⁺ in solution.
In examining the formula for acetic acid, HC2H3O2, the ionizable hydrogen atom(s) is/are
the H on the left.
What are the products of a neutralization reaction?
water and salt
Which of the following is the active ingredient of baking soda?
NaHCO3
What is the conjugate base of H2O?
OH⁻
A 25.0 ml sample of 0.105 M HCl was titrated with 31.5 ml of NaOH. What is the concentration of the NaOH?
0.0833 M
A 35.0 mL sample of 0.225 M HBr was titrated with 42.3 mL of KOH. What is the concentration of the KOH?
0.186 M
Exactly 17.0 mL of a H2SO4 solution was required to neutralize 45.0 mL of 0.235 M NaOH. What was the concentration of the H2SO4 solution?
0.311 M
What is the concentration of H⁺ in 0.50 M hydroiodic acid?
0.50 M
Which of the following statements about a base are TRUE? 1. Bases are used in the manufacturing of soap. 2. Bases have a sour taste. 3. Fertilizer manufacture and cotton processing use bases.
1 and 3 only
Acid rain legislation targeted the release of which compound by industry?
SO2
Which of the following statements are TRUE of buffer solutions? 1. A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate. 2. A buffer solution can be made by mixing equal concentrations of hydrochloric acid and sodium chloride. 3. A buffer solution resists changes in pH when small quantities of acid or base are added.
1 and 3 only
What is the value of the ion product constant for water (Kw)?
1.0 × 10-14
What is the concentration of the hydronium ions in a neutral solution?
1.0 × 10-7 M
What is the concentration of H⁺ in 2.0 M acetic acid, HC2H3O2?
< 2.0 M
What is the concentration of the hydronium ions in an acidic solution?
> 1.0 × 10-7 M
A neutralization reaction between an acid and sodium hydroxide formed water and the salt named sodium sulfate. What was the formula of the acid that was neutralized?
H2SO4
Which of the following acids is diprotic?
H2SO4
Which combination below will be a buffer solution?
HC2H3O2 and NaC2H3O2
Which of the following contributes to acid rain?
The reaction of nonmetal oxides with water.
Pure water cannot conduct electricity so why do we have to be careful with electrical appliances near water?
Water always has some ions dissolved in it.
In a solution that has a pH = 7.0,
[H3O+] = [OH-]
A solution at 25°C has a hydrogen ion concentration of 2.6 × 10-5 M. Which of the following is TRUE?
[H3O+] > [OH-]
In order for a solution to be acidic
[H3O+] > [OH-]
Which of the following acids is a monoprotic, strong acid?
hydrobromic acid
When an acid reacts with a metal, what is one of the usual products?
hydrogen gas
