The total volume required to reach the endpoint of a titration required more than the 50 ml50 ml total volume of the buret. an initial volume of 49.37±0.06 ml49.37±0.06 ml was delivered, the buret was refilled, and an additional 1.34±0.05 ml1.34±0.05 ml was delivered before the endpoint was reached. the titration of a blank solution without the analyte required 0.51±0.04 ml0.51±0.04 ml . calculate the endpoint volume corrected for the blank and its absolute uncertainty.

The endpoint volume and its absolute uncertainty is 51.22±0.15mL

Explanation:

The volume of titrant consumed at the equivalence point is the sum of the total volume consumed. In this case, is the sum of 49.37±0.06 mL and 1.34±0.05 mL. Also, it is important to subtract the blank volume to the total titrant volume to correct this. Thus,

V = (49.37±0.06 mL + 1.34±0.05 mL) - 0.51±0.04 mL

The volume values are added and subtracted normally, but the errors are added to obtain the absolute uncertainty:

V = ((49.37 + 1.34 - 0.51) ± (0.06 + 0.05 + 0.04) )mL

V = 51.22±0.15mL