Question 1

At 25°C a solution has a hydroxide-ion concentration of 8.22 × 10-5 M.What is its hydronium-ion concentration?

Accepted Answer

A) 8.22 × 10-19 M 
B) 1.00 × 10-7 M 
C) 1.00 × 10-14 M 
D) 8.22 × 10-5 M 
E) 1.22 × 10-10 M 
A) 8.22 × 10-19 M 
B) 1.00 × 10-7 M 
C) 1.00 × 10-14 M 
D) 8.22 × 10-5 M 
E) 1.22 × 10-10 M

Question 2

Which solution would cause blue litmus to turn red?

Accepted Answer

A) a solution of pH 10 
B) a solution of 0.01 M NH3 
C) a solution of pOH 4 
D) a solution of 0.005 M CH3COOH 
E) a solution of 0.10 M NaOH 
A) a solution of pH 10 
B) a solution of 0.01 M NH3 
C) a solution of pOH 4 
D) a solution of 0.005 M CH3COOH 
E) a solution of 0.10 M NaOH

Question 3

What is the pOH of a 0.0027 M Ba(OH)2 solution?

Accepted Answer

A) 8.78 
B) 11.43 
C) 11.73 
D) 2.27 
E) 2.57 
A) 8.78 
B) 11.43 
C) 11.73 
D) 2.27 
E) 2.57

Question 4

What is the hydronium-ion concentration in a solution formed by combining 450 mL of 0.10 M NaOH with 150 mL of 0.30 M HCl?
NaOH(aq)+ HCl(aq)→ NaCl(aq)+ H2O(l)

Accepted Answer

A) 0.045 M 
B) 1.7 × 10-13 M 
C) 1.0 × 10-7 M 
D) 0.30 M 
E) 0.10 M 
A) 0.045 M 
B) 1.7 × 10-13 M 
C) 1.0 × 10-7 M 
D) 0.30 M 
E) 0.10 M

Question 5

A solution has a hydroxide-ion concentration of 0.078 M.What is its pH?

Accepted Answer

A) 15.11 
B) 12.89 
C) 16.55 
D) 7.00 
E) 1.11 
A) 15.11 
B) 12.89 
C) 16.55 
D) 7.00 
E) 1.11

Question 6

In a(n)_____ solution,at 25°C,the concentrations of H3O+ and OH- ions remain equal as they are in pure water.

Accepted Answer

A) ​acidic 
B) ​basic 
C) ​neutral 
D) ​alkaline 
E) ​carborane 
A) ​acidic 
B) ​basic 
C) ​neutral 
D) ​alkaline 
E) ​carborane

Question 7

What is the pH of a solution prepared by dissolving 0.195 g of NaOH(s)in 9.00 L of water?

Accepted Answer

A) 2.312 
B) 11.688 
C) 7.000 
D) 10.734 
E) 3.266 
A) 2.312 
B) 11.688 
C) 7.000 
D) 10.734 
E) 3.266

Question 8

What is the leveling effect?

Accepted Answer

A) All bases are 100% ionized in water. 
B) All acids are 100% ionized in solvents other than water. 
C) All strong acids are 100% ionized in water. 
D) An acid with a higher concentration in water has a lower pH than an acid with a lower concentration in water. 
E) A base with a higher concentration in water has a lower pH than a base with a lower concentration in water. 
A) All bases are 100% ionized in water. 
B) All acids are 100% ionized in solvents other than water. 
C) All strong acids are 100% ionized in water. 
D) An acid with a higher concentration in water has a lower pH than an acid with a lower concentration in water. 
E) A base with a higher concentration in water has a lower pH than a base with a lower concentration in water.

Question 9

Which of the following solutes,dissolved in 1.0 kg of water,would be expected to provide the fewest particles and to freeze at the highest temperature?

Accepted Answer

A) 0.10 mol HClO 
B) 0.10 mol HClO3 
C) 0.10 mol HClO2 
D) 0.10 mol HClO4 
E) 0.10 mol HCl 
A) 0.10 mol HClO 
B) 0.10 mol HClO3 
C) 0.10 mol HClO2 
D) 0.10 mol HClO4 
E) 0.10 mol HCl

Question 10

A solution has a pOH of 5.20.What is its hydroxide-ion concentration?

Accepted Answer

A) 1.5 × 10-4 M 
B) 5.2 M 
C) 1.6 × 10-9 M 
D) 6.3 × 10-6 M 
E) 5.5 × 10-3 M 
A) 1.5 × 10-4 M 
B) 5.2 M 
C) 1.6 × 10-9 M 
D) 6.3 × 10-6 M 
E) 5.5 × 10-3 M

Question 11

The hydronium-ion concentration of a solution is 8.2 × 10-6 M.What is the pH of the solution?

Accepted Answer

A) 6.30 
B) 3.26 
C) 2.00 
D) 5.09 
E) 9.41 
A) 6.30 
B) 3.26 
C) 2.00 
D) 5.09 
E) 9.41

Question 12

What is a conjugate acid-base pair for the following equilibrium?
H2O(l)+ NH4+(aq)  
NH3(aq)+ H3O+(aq)

Accepted Answer

A) H2O is an acid and NH3 is its conjugate base. 
B) H2O is an acid and H3O+ is its conjugate base. 
C) NH4+ is an acid and NH3 is its conjugate base. 
D) H2O is a base and NH3 is its conjugate acid. 
E) H2O is a base and NH4+ is its conjugate acid. 
A) H2O is an acid and NH3 is its conjugate base. 
B) H2O is an acid and H3O+ is its conjugate base. 
C) NH4+ is an acid and NH3 is its conjugate base. 
D) H2O is a base and NH3 is its conjugate acid. 
E) H2O is a base and NH4+ is its conjugate acid.

Question 13

Which aqueous solution has the lowest pH?

Accepted Answer

A) 0.30 M HCl 
B) 0.30 M NaOH 
C) 0.30 M NH3 
D) 0.30 M Ba(OH)2 
E) 0.30 M H2SO4 
A) 0.30 M HCl 
B) 0.30 M NaOH 
C) 0.30 M NH3 
D) 0.30 M Ba(OH)2 
E) 0.30 M H2SO4

Question 14

Which of the following species is not capable of acting as an Arrhenius acid in aqueous solution?

Accepted Answer

A) CH4 
B) ​HSO3- 
C) H2SO3 
D) H3O+ 
E) HCl 
A) CH4 
B) ​HSO3- 
C) H2SO3 
D) H3O+ 
E) HCl

Question 15

Which of the following species is not capable of acting as an Arrhenius acid in aqueous solution?

Accepted Answer

A) ClO4- 
B) HClO3 
C) H2SO3 
D) H3PO4 
E) HSO4- 
A) ClO4- 
B) HClO3 
C) H2SO3 
D) H3PO4 
E) HSO4-

Question 16

At 10°C,the ion-product constant of water,Kw,is 6.88 × 10-15.What is the pH of pure water at 10°C?

Accepted Answer

A) 7.000 
B) 6.684 
C) 7.364 
D) 7.264 
E) none of these 
A) 7.000 
B) 6.684 
C) 7.364 
D) 7.264 
E) none of these

Question 17

Which acid has the strongest conjugate base in aqueous solution?

Accepted Answer

A) HF 
B) HNO3 
C) HClO4 
D) HI 
E) H2SO4 
A) HF 
B) HNO3 
C) HClO4 
D) HI 
E) H2SO4

Question 18

An _____ is a species that can act as either an acid or a base.

Accepted Answer

A) aliphatic species​ 
B) allotropic species​ 
C) isomeric species​ 
D) amphiprotic species​ 
E) ​aromatic species 
A) aliphatic species​ 
B) allotropic species​ 
C) isomeric species​ 
D) amphiprotic species​ 
E) ​aromatic species

Question 19

What is the pH of a 0.072 M HClO4 solution?

Accepted Answer

A) 15.14 
B) 2.63 
C) 12.86 
D) 1.14 
E) 11.37 
A) 15.14 
B) 2.63 
C) 12.86 
D) 1.14 
E) 11.37

Question 20

The pH of a solution of a strong base is 10.32 at 25°C.What is its hydronium-ion concentration?

Accepted Answer

A) 3.1 × 10-3 M 
B) 2.1 × 10-4 M 
C) 1.6 × 10-4 M 
D) 4.8 × 10-11 M 
E) 1.4 × 10-2 M 
A) 3.1 × 10-3 M 
B) 2.1 × 10-4 M 
C) 1.6 × 10-4 M 
D) 4.8 × 10-11 M 
E) 1.4 × 10-2 M

Exam 15: Acids and Bases

At 25°C a solution has a hydroxide-ion concentration of 8.22 × 10-5 M.What is its hydronium-ion concentration?

Which solution would cause blue litmus to turn red?

What is the pOH of a 0.0027 M Ba(OH)2 solution?

What is the hydronium-ion concentration in a solution formed by combining 450 mL of 0.10 M NaOH with 150 mL of 0.30 M HCl? NaOH(aq)+ HCl(aq)→ NaCl(aq)+ H2O(l)

A solution has a hydroxide-ion concentration of 0.078 M.What is its pH?

In a(n)_____ solution,at 25°C,the concentrations of H3O+ and OH- ions remain equal as they are in pure water.

What is the pH of a solution prepared by dissolving 0.195 g of NaOH(s)in 9.00 L of water?

What is the leveling effect?

Which of the following solutes,dissolved in 1.0 kg of water,would be expected to provide the fewest particles and to freeze at the highest temperature?

A solution has a pOH of 5.20.What is its hydroxide-ion concentration?

The hydronium-ion concentration of a solution is 8.2 × 10-6 M.What is the pH of the solution?

What is a conjugate acid-base pair for the following equilibrium? H2O(l)+ NH4+(aq) NH3(aq)+ H3O+(aq)

Which aqueous solution has the lowest pH?

Which of the following species is not capable of acting as an Arrhenius acid in aqueous solution?

Which of the following species is not capable of acting as an Arrhenius acid in aqueous solution?

At 10°C,the ion-product constant of water,Kw,is 6.88 × 10-15.What is the pH of pure water at 10°C?

Which acid has the strongest conjugate base in aqueous solution?

An _____ is a species that can act as either an acid or a base.

What is the pH of a 0.072 M HClO4 solution?

The pH of a solution of a strong base is 10.32 at 25°C.What is its hydronium-ion concentration?

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Filters

At 25°C a solution has a hydroxide-ion concentration of 8.22 × 10^-5 M.What is its hydronium-ion concentration?

What is the pOH of a 0.0027 M Ba(OH)₂ solution?

What is the hydronium-ion concentration in a solution formed by combining 450 mL of 0.10 M NaOH with 150 mL of 0.30 M HCl? NaOH(aq)+ HCl(aq)→ NaCl(aq)+ H₂O(l)

In a(n)_____ solution,at 25°C,the concentrations of H₃O⁺ and OH^- ions remain equal as they are in pure water.

The hydronium-ion concentration of a solution is 8.2 × 10^-6 M.What is the pH of the solution?

What is a conjugate acid-base pair for the following equilibrium? H₂O(l)+ NH₄⁺(aq) NH₃(aq)+ H₃O⁺(aq)

At 10°C,the ion-product constant of water,K_w,is 6.88 × 10^-15.What is the pH of pure water at 10°C?

What is the pH of a 0.072 M HClO₄ solution?