Construct a graph pH versus titrant volume, mark on your graph where the indicator color changes were observed. Compute the first derivative for each data point. Within + 1 ml of the equivalence volume. Based on the graph estimate the equivalence volume. Compute the second derivative prepare a graph and locate the equivalence volume. From equivalence volume and mass unknown (3.0011g) calculate molecular mass unknown. Volume titrant versus pH :0ml PH= 3.84 1.5 ml PH= 4.19 3.0 ml pH=4.40 4.5 ml pH=4.53 6.0 ml pH=4.66 7.5 ml pH=4.75 9.0ml pH=4.90 10.5 ml pH=5.11 12.0ml pH=5.29 13.0 ml pH=5.41 14.0ml pH=5.54 14.5ml pH=5.63 15.0 ml pH=5.71 15.5 ml pH=5.86 16.0 ml pH=5.94 16.5 ml pH=6.17 17.0ml pH=6.39 color change to pink 17.5 ml pH=7.26 color change pink 18.0 ml pH=9.93 18.1 ml pH=10.24 18.2 ml pH=10.31 18.3 ml pH=10.54 19.8 ml pH=10.61 21.3 ml pH=10.90 22.8ml pH=11.13 24.3ml pH=11.18