DRILL ON pH ,pOH Student’s
Name____________________
Complete the following table.
Concentration
of Solute
|
Solute
Fromula
|
[H+]
|
[OH-]
|
pH
|
pOH
|
0.15M
|
NaOH
|
||||
Ba(OH)2
|
12.7
|
||||
0.15M
|
HNO3
|
||||
0.15M
|
HF
|
||||
0.15M
|
H2SO4
|
||||
1.0x
10-4
|
HF
|
||||
Reference:
Problem Exercises For General Chemistry
3rd edition
By
G.GILBERT LONG, FOFFEST C. HENTZ
MCQs of ACID ,BASE and SALT
1. The pH of
solution which contain 0.001 M H+
A.4
B.
3
C.
11
D.
1
2. The
concentration of H+ ion in water
A.
0.0000001 mol/dm3
B.
0.0001 mol/dm3
C.
0.00001 mol/dm3
D.
0.001 mol/dm3
3. Conjugate
acid of weak base is the
A.
Weakest acid
B.Strongest
acid
C.Moderate
D.None
of above
4. The pH of
buffer is equal pKa when concentration of salt is
A.
Concentration of salt and concentration
of acid is equal
B.
Concentration of salt is twice of concentration of acid
C. Concentration of salt is half than concentration of acid
D. Concentration of salt is less than concentration of acid
5. In
Neutralization reaction of strong acid HCl and strong base NaOH; 10 ml of 0.5M HCl required to complete neutralization of 0.25 M NaOH of
A . 20 ml of NaOH
B. 10 ml of NaOH
C. 15 ml of NaOH
D. 5 ml of NaOH
6. How many
milliliter of 0.05M NaOH required to titrate of 10ml of 0.1M HCl
A . 5ml
B. 10 ml
C. 20 ml
D. 15 ml
7.
Mixing 0.1 mol of NaOH, 0.1 mol of CH3COOH in 1 lit of water yields a solution, which:
A. is acidic
B. is neutral
C. is basic
D. may be acidic, basic or
neutral depending upon temperature
8. The
dissociation constant of Pure water is
14
A. Increases with increase in
temperature
B. Decreases with increase in temperature
C. Is constant & is independent of
temperature
D. increase in low temperature
range but decreases in high temperature range
9.What
will be the change in the pH of water if 10-3 mol of NaOH is added
to 1.0 dm3 of water at
250C
A. Increased by 3
B. Increased by 4
C. Decreased by 2
D. Decreased by 4
10. When 1.0 cm3 of a
weak acid solution is added to 100cm3 of a buffer solution
A.
the volume of the resulting mixture will be 100cm3
B.
there will be almost no change in the pH of solution
C.
the pH of the solution will increase noticeably
D.
the pH of the solution will decrease noticeably
11. Which salt does not form an
acidic solution in water?
A.
MgCl2
B.
Na2CO3
C.
FeCl3
D.
NH4NO3
12. Which species cannot act as a
lewis acid ?
A.
BF3
B. AlCl3
C.
NH3
D. Fe2+
13. Three acids HA, HB & HC
have the following Ka values
i.
Ka of HA = 1 x 10-5
ii. Ka of HB = 2 x 10-5
iii.
Ka HC =1 x 10-6
What is the correct increasing
order of acidic strength?
A.
HA< HB<, HC
B.
HC< HA< HB
C.
HC< HB< HA
D.
HB< HA< HC
14. Which of the
following reagents could be added together to make a buffer solution?
A.
NaOH and CH3COOH
B.
CH3COONa and CH3COOH
C. NaOH & NaCH3COO
D. NH4Cl and NH3
15. Which of the following
solutions has the smallest [H3O+]?
A.
0.10M HCl
B.
0.10M H2SO4
C.
0.10M HNO3
D.
0.10M NH4Cl
answer key?
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