Lab 1
Table 1.0 Absorbance and concentration of standard solution and unknown solution before data
handling
1
2
3
4
5
6
7
8
Average
25ppm
0.178
0.212
0.178
0.162
0.168
0.238
0.180
0.189
50ppm
0.428
0.351
0.373
0.382
0.380
0.448
0.421
0.215
100ppm
0.725
0.777
0.771
0.765
0.780
0.758
0.777
0.686
Unknown
0.072
0.060
0.023
0.088
0.076
0.053
0.044
0.130
Lab 2
Table 1 shows the result of calibration of 1mL autopipette of 7 groups
Types of
glassware
Volume
transferred(ml)
Weight of
water (G)
1.0052
0.9850
0.9893
1ml
autopipette
1.0
1.0293
1.0160
0.9924
1.0322
Relative standard
Mean±SD deviation (%)