Answer to Question #66607 in Physical Chemistry for murahi

Question

Question 17 : How many coulombs of charge pass through a cell if 2.40 amperes of current are passed through the cell for 85.0 minutes?
204 C
2120 C
12200 C
0.133 C

Question 18 : Which of the followings is not a Bronsted acid?
HCl

H
2
S
O
4
H2SO4


A
l
C
l
3
AlCl3


H
N
O
3
HNO3


Question 19 : Which of the following mixtures produces a buffer solution?
0.300 M
K
N
O
3
KNO3
+ 0.100 M NaCl (50 mL each)
0.400 M
C
H
3
C
O
O
H
CH3COOH
+ 0.100 M
C
H
3
C
O
O
N
a
CH3COONa
(50 mL each)
0.300 M
N
H
4
C
l
NH4Cl
+ 0.100 M HCl (50 mL each)
0.300 M NaOH + 0.100 M HCl (50 mL each)

Question 20 : The common-ion effect
promotes evaporation.
promotes condensation
reduces ionization.
increases solubility

Answer 1

Question 17: How many coulombs of charge pass through a cell if 2.40 amperes of current are passed through the cell for 85.0 minutes?
204 C
2120 C
12200 C
0.133 C
Answer: 12200 C
Question 18: Which of the followings is not a Bronsted acid?
HCl
H2SO4
AlCl3
HNO3
Answer: AlCl3
Question 19: Which of the following mixtures produces a buffer solution?
0.300 M KNO3+ 0.100 M NaCl (50 mL each)
0.400 M CH3COOH+ 0.100 M CH3COONa (50 mL each)
0.300 M NH4Cl + 0.100 M HCl (50 mL each)
0.300 M NaOH + 0.100 M HCl (50 mL each)
Answer: 0.400 M CH3COOH+ 0.100 M CH3COONa (50 mL each)
Question 20: The common-ion effect
promotes evaporation.
promotes condensation
reduces ionization.
increases solubility
Answer: reduces ionization