In Experiments 1 and 2, how is the end point of the titration observed? The end point is observed when the analyte solution turns from colorless to pink. O The end point is observed when there is a large change in absorbance over a small volume of added titrant. O The end point is observed when there is a large change in pH over a small volume of added titrant. The end point is observed when there is a large change in conductivity over a small volume of added titrant