Asked by pinky
Calculat the weight of KMnO4 in GMs necessary to prepare 250ml of N/10 KMnO4 solution
Answers
Answered by
DrBob222
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.
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.
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