The document contains two experiments measuring potential and absorbance. Experiment 1 shows the potential in mV decreases as the volume of oxalic acid increases from 0-25ml, then increases from 25-60ml. Experiment 2 measures increasing absorbance with increasing concentration of a substance from 10-70 μg/ml, then a sharp increase at 80 μg/ml.

1. Exp no 04:-
Volume of
Oxalic acid
(ml)
Potential
(mV)
0 -215
5 -208
10 -194
15 -185
20 -165
25 -58
30 274
35 305
40 321
45 338
50 356
55 37
60 379
-300
-200
-100
0
100
200
300
400
500
0 10 20 30 40 50 60 70
Potential(mV)
Volume of acid(ml)
Standardization by potentiometry
End point

2. Exp 05
Concentration(g/ml) Absorbance
10 0.0967
20 0.2526
30 0.4198
40 0.5229
50 0.6435
60 0.7938
70 0.9132
80 3.2864