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WorksheetsBUFFER SOLUTION
Total questions: 10
Worksheet time: 44mins
The buffer solution is able to maintain pH by some events, except . . .
The addition of a little acid
The addition of a little base
Dilution
Addition of water
The addition of excess acid
The following incorrect statement of the buffer solution is that the pH of the buffer solution . . .
Relatively constant
Not changed by the addition of a small amount of acid solution
Not changed by dilution
Not changed by the addition of a little base
Same as pKa or pKb
The following solution mixture which is not buffer is . . .
NaH2PO4 and Na2HPO4
NH3 and (NH4)2SO4
HCOOH and Ba(HCOO)2
H3PO4 and NaH2PO4
NaOH and Ba(HCOO)2
The following mixture of solutions that form a buffer solution is . . .
50 mL CH3COOH 0.2 M and 50 mL NaOH 0.1 M
50 mL CH3COOH 0.2 M and 100 mL NaOH 0.1 M
50 mL HCl 0.2 M and 100 mL NH4OH 0.1 M
50 mL HCl 0.2 M and 50 mL NH4OH 0.1 M
50 mL HCl 0.2 M and 100 mL NaOH 0.1 M
The pH solution that consist of NH4OH 0.2 M and (NH4)2SO4 0.1 M with Kb NH4OH = 10-5 is . . .
5 – log 2
5
7
9
9 + log 2
The pH solution that consist of CH3COOH 0.01 M and CH3COONa 0.01 M with Ka = 10-5 is . . .
4
5
6
8
9
To produce buffer solution with pH = 5, then ratio volume of propionat acid 0.2 M with sodium propionat 0.1 M (Ka = 2 x 10-5) is . . .
1 : 1
2 : 1
4 : 1
1 : 2
1 : 4
1000 mL CH3COOH 0.1 M is mixtured with 1000 mL CH3COONa 0.1 M (Ka = 10-5), then the pH of that solution if added 10 mL HCl 0.1 M is . . .
5
5 – log 1.02
7
6 – log 9.8
6
1000 mL CH3COOH 0.1 M is mixtured with 1000 mL CH3COONa 0.1 M (Ka = 10-5), then the pH of that solution if added 20 mL NaOH 0.05 M is . . .
5
5 – log 1.02
7
6 – log 9.8
6
1000 mL CH3COOH 0.1 M is mixtured with 1000 mL CH3COONa 0.1 M (Ka = 10-5), then the pH of that solution if added 4 L water is . . .
5
5 – log 1.02
7
6 – log 9.8
6
