How do I calculate the average volume of my titration?

Question

When doing a titration, my results were 12.85, 12.87, 12.93. How do I average this? Do I use the two closest to each other, the last two, or all three? My teacher required us to do a minimum of 3 trials.

Answer 1

To calculate the average volume of the titration just take the mathematical average and use the correct significant figures.

 

Average Volume= (12.85+12.87+12.93)/3

Average Volume= 12.88333= 12.88