Q: A solution of 0.10 M HCl has a pH of:

$$\text{pH} = -\log(0.10) = 1.00$$

Q: A buffer solution is prepared using acetic acid (p$$K_a = 4.76) $$and sodium acetate. If the ratio $$\frac{[\text{CH}_3\text{COO}^-]}{[\text{CH}_3\text{COOH}]} = 10$$, what is the pH?

$$\text{pH} = 4.76 + \log(10) = 5.76$$

Q: Which of the following is a correct representation of the ionization of water?

$$\text{H}_2\text{O}(l) + \text{H}_2\text{O}(l) \rightleftharpoons \text{H}_3\text{O}^+(aq) + \text{OH}^-(aq)$$

Q: Which of the following is true for a neutral solution at 25$$^\circC$$?

$$[\text{H}^+] = [\text{OH}^-]$$

Q: Which of the following is the correct relationship for the pH and pOH of a solution at 25$$^\circC$$?

$$\text{pH} + \text{pOH} = 14$$

Question 1

Which of the following statements best describes a Brønsted-Lowry acid?

Accepted Answer

A substance that donates a proton (H$$^+) to $$another substance.

Question 2

Which of the following is the correct conjugate base of acetic acid (CH$$_3$$COOH)?

Accepted Answer

CH$$_3$$COO$$^-$$

Question 3

A solution of 0.10 M HCl has a pH of:

Accepted Answer

$$	ext{pH} = -\log(0.10) = 1.00$$

Question 4

Which of the following is a weak electrolyte?

Accepted Answer

CH$$_3$$COOH

Question 5

What is the pH of a solution with [H$$_3O$^+$$] = $$1 	imes 10$$^{-5}$$ M?

Accepted Answer

$$	ext{pH} = 5$$

Question 6

Which of the following pairs can act as a buffer solution?

Accepted Answer

CH$$_3$$COOH and CH$$_3$$COONa

Question 7

A buffer solution is prepared using acetic acid (p$$K_a = 4.76) $$and sodium acetate. If the ratio $$\frac{[	ext{CH}_3	ext{COO}^-]}{[	ext{CH}_3	ext{COOH}]} = 10$$, what is the pH?

Accepted Answer

$$	ext{pH} = 4.76 + \log(10) = 5.76$$

Question 8

Which of the following is an example of an amphiprotic substance?

Accepted Answer

H$$_2O$$

Question 9

A titration is performed using 0.205 L of 0.150 M H$$_2SO$_4 to $$neutralize 0.143 L of NaOH. What is the concentration of NaOH?

Accepted Answer

$$0.430\ 	ext{M}$$

Question 10

Which of the following best describes the relationship between the strength of an acid and its conjugate base?

Accepted Answer

A strong acid has a weak conjugate base.

Question 11

Which of the following is a correct representation of the ionization of water?

Accepted Answer

$$	ext{H}_2	ext{O}(l) + 	ext{H}_2	ext{O}(l) ightleftharpoons 	ext{H}_3	ext{O}^+(aq) + 	ext{OH}^-(aq)$$

Question 12

Which of the following is true for a neutral solution at 25$$^\circC$$?

Accepted Answer

$$[	ext{H}^+] = [	ext{OH}^-]$$

Question 13

Which of the following is a property of a strong electrolyte?

Accepted Answer

It dissociates completely into ions in solution.

Question 14

Which of the following is the correct formula for the acid ionization constant ($$K_a) $$for a weak acid HA?

Accepted Answer

$$K_a = \frac{[A^-][H_3O^+]}{[HA]}$$

Question 15

Which of the following is a real-life example of a buffer system in the human body?

Accepted Answer

H$$_2CO$_3/$$HCO$$_3^- in $$blood

Question 16

Which of the following best describes the effect of adding a small amount of strong acid to a buffer solution?

Accepted Answer

The pH changes only slightly.

Question 17

Which of the following is the correct relationship for the pH and pOH of a solution at 25$$^\circC$$?

Accepted Answer

$$	ext{pH} + 	ext{pOH} = 14$$

Question 18

Which of the following is a diprotic acid?

Accepted Answer

H$$_2SO$_4$$

Question 19

Which of the following is the correct name for HNO$$_2$$?

Accepted Answer

Nitrous acid

Acids, Bases, and Buffers: General Chemistry Study Notes

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