Undiluted (20ml buffer ) Volume of HCL Added PH Volume

Undiluted (20ml buffer )
Volume of HCL Added
PH
Volume of NaOH
PH
0.0
6.77
0.0
6.75
1.0
6.76
1.0
6.76
2.0
6.65
2.0
6.81
3.0
6.62
3.0
6.89
4.0
6.57
4.0
6.86
5.0
6.51
5.0
6.99
2- 10.00 ml of buffer add 10.0ml of water
Volume of HCL Added
PH
Volume of NaOH
PH
0.0
6.85
0.0
6.90
1.0
6.83
1.0
6.97
2.0
6.80
2.0
7.04
3.0
6.75
3.0
7.09
4.0
6.69
4.0
7.18
5.0
6.66
5.0
7.23
2.0ML of buffer add 18.0 ml of water
Volume of HCL Added
PH
Volume of NaOH
PH
0.0
6.86
0.0
6.86
1.0
6.38
1.0
7.37
2.0
3.81
2.0
8.75
3.0
2.80
3.0
11.22
4.0
2.60
4.0
11.62
5.0
1.97
5.0
11.93
We added 1 ml each time.
The calculation of preparation of a buffer is 5.44g and the solution KOH is 20ml
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