The pH of a solution with H+H^+H+ concentration of 1×10−81 \times 10^{-8}1×10−8 M is:
a) 2
b) 6
c) 8
d) 12
Answer: c
The KwK_wKw of water at 25°C is:
a) 1×10−141 \times 10^{-14}1×10−14
b) 1×10−71 \times 10^{-7}1×10−7
c) 1×10−101 \times 10^{-10}1×10−10
d) 1×10−41 \times 10^{-4}1×10−4
Answer: a
Which of the following acids is a diprotic acid?
a) HClHClHCl
b) H2SO4H_2SO_4H2SO4
c) HNO3HNO_3HNO3
d) HClO4HClO_4HClO4
Answer: b
Which of the following substances is amphoteric?
a) NaOH
b) Al2O3Al_2O_3Al2O3
c) HClHClHCl
d) Na2SO4Na_2SO_4Na2SO4
Answer: b
What is the pH of a 0.01 M solution of KOHKOHKOH?
a) 2
b) 4
c) 12
d) 14
Answer: c
Which of the following is a characteristic of a buffer solution?
a) It has a pH of 7
b) It resists changes in pH
c) It contains a strong acid and a strong base
d) It neutralizes strong acids and bases
Answer: b
In the Bronsted-Lowry theory, a base is defined as:
a) A proton donor
b) A proton acceptor
c) An electron donor
d) An electron acceptor
Answer: b
The pH of a 0.1 M CH3COOHCH_3COOHCH3COOH solution is closest to:
a) 2
b) 3
c) 5
d) 7
Answer: c
Which of the following is a triprotic acid?
a) HClHClHCl
b) H2SO4H_2SO_4H2SO4
c) H3PO4H_3PO_4H3PO4
d) HNO3HNO_3HNO3
Answer: c
What is the relationship between the strength of an acid and its conjugate base?
a) A strong acid has a strong conjugate base
b) A strong acid has a weak conjugate base
c) A weak acid has a strong conjugate base
d) Both b and c
Answer: d