3. 11.84 40.13 41.11 0.98 40.42
11.91 41.11 42.12 1.01 41.43
11.97 42.12 43.10 0.98 42.41
pH of solution vs. Volume of NaOH used
14.00
12.00
10.00
8.00
pH
Series1
6.00
4.00
2.00
0.00
0.00 10.00 20.00 30.00 40.00 50.00
Volume of NaOH used
ph 2.93 ph 8.51
equivalenc
e volume 16.04 volume 36.11
DAY 2
pH meter used – (#2) OAKTON pH/MV/oC meter
Calibration of instrument – Measurement of Buffers
Buffer solution pH measured
Buffer 4 3.99
Buffer 7 7.00
Buffer 10 10.00
Note: The results of the standardization of NaOH carried out on day two were rejected due to random
errors that occurred during the process. The results obtained from day 1 were used.
7