Question

If the pipette were wet with water prior to filling it with potassium permanganate, how would that affect the % H_2O_2?

A. It would increase the % H_2O_2.
B. It would decrease the % H_2O_2.
C. It would have no effect on the % H_2O_2.

Answer 1

Using a wet pipette would dilute the potassium permanganate and lead to an inaccurate, lower percentage of hydrogen peroxide detected.

Step-by-step explanation:

If the pipette were wet with water prior to filling it with potassium permanganate, this would dilute the potassium permanganate solution, which could potentially lead to a decrease in the % H₂O₂. This is because the titration would use a diluted potassium permanganate solution, which would result in a decreased concentration when determining the amount of hydrogen peroxide present.

Therefore, the calculated percentage of hydrogen peroxide in the solution would be lower than it actually is.