Calculat the weight of KMnO4 in GMs necessary to prepare 250ml of N/10 KMnO4 solution

Answer 1

The truth is that you CAN NOT calculate this without knowing the reaction you're dealing with. Generally, however, KMnO4 is used in acid solution where the equivalent weight is 1/5 the molar mass.
What is a GM? gram mols. I'm not sure i know what a GM is but here is how you prepare 250 mL of a 1/10 N KMnO4 solution.
molar mass is approx 158 (just an estimate so you need to recalculate that). Then the equivalent weight is approx 158/5 = appprox 32.
So you will need 0.1 x 0.250 = approx 0.025 equivalents.
0.025 x equivalent weights x 32 = ? in grams.
Post your work if have follow up questions.