Question

How many moles of KMnO4 are reacted if a titration uses 20.0 ml of 0.100 M KMnO4?

Answer 1

0.002mol of KMnO4 are reacted if a titration uses 20.0 ml of 0.100 M KMnO4

HOW TO CALCULATE NUMBER OF MOLES:

• The number of moles of KMnO4 can be calculated by multiplying the molarity of the solution by the volume as follows:

• no. of moles (mol) = molarity (M) × volume (L)

• According to this question, a titration uses 20.0 ml of 0.100 M KMnO4.

• The volume of the KMnO4 solution in litres is 20/1000 = 0.02L

• The number of moles is calculated thus:

• no. of moles = 0.02L × 0.100

• no. of moles = 0.002mol

• Therefore, 0.002mol of KMnO4 are reacted if a titration uses 20.0 ml of 0.100 M KMnO4

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