Answer: -
25%, 5% and 2.5% are the percentage error arising in an experiment when 1-ml, 5-ml, and 10-ml pipette are used for transfer.
Explanation:-
We are told that each pipette contains 5 drops of water adhering to the inside of the barrel.
We are also told that a single drop of water has an approximate volume of 0.05 ml.
Total volume of water adhering to the inside of the barrel = 5 x 0.05
= 0.25 mL
This volume of water adhering to the inside of the barrel is the cause of error in an experiment.
Thus percentage error = [tex]\frac{Total error}{Actual value}[/tex] x 100
For 1 mL pipette,
Percentage error = [tex]\frac{0.25 mL}{1 mL}[/tex] x 100
= 25%
For 5 mL pipette,
Percentage error = [tex]\frac{0.25 mL}{5 mL}[/tex] x 100
= 5%
For 10 mL pipette,
Percentage error = [tex]\frac{0.25 mL}{10 mL}[/tex] x 100
= 2.5%
