Join TSR now and get all your revision questions answeredSign up now

How to find the number of moles from volume? Watch

    • Thread Starter
    Offline

    1
    ReputationRep:
    Potassium Manganate(VII) has a concentration of 0.0200mol/dm3.

    Two moles of potassium manganate(VII) react with five moles of oxalic acid crystals. Deduce the number of moles of oxalic acid crystals in 25.0 cm3 of H.

    Can someone please explain the procedures for this?

    Note: The question before this required you to find the number of moles of potassium manganate(VII) in a volume of 27.2, which was 0.000544 (mol). Am not sure if this helpful but it was part of the whole question.
    Offline

    1
    ReputationRep:
    Volume * Concentration = Moles
    so therefore just multiply 0.2moldm^-3 * (25/1000) dm^-3 to get the number of moles of potassium manganate, and they're in a ratio of 2:5, so just multiply your answer by 2.5
 
 
 
Poll
Is GoT overrated?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.