July 16, 2019, 05:11:07 AM
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Topic: hard redox calculation  (Read 178 times)

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Offline Clifj029

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hard redox calculation
« on: June 25, 2019, 06:11:18 PM »
Have been struggling with this, any help is appreciated :
Calculate the masses of anhydrous Iron(II) and Iron(III) sulphate present in 1dm3 Of solution from the following results:
25cm3 of the solution was oxidised by 23.0cm3 of 0.02mol dm-3 KMnO4
After reduction by zinc and dilute sulphuric acid, 25.00cm3 of the solution required 40.0cm3 of the same KMnO4 solution.
(Fe = 55.8, S=32.1, O=16.0)
(Use MnO4^- + 8H+ 5e- -> Mn^2+ 4H2O)

Offline Borek

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Re: hard redox calculation
« Reply #1 on: June 26, 2019, 02:47:47 AM »
What is being oxidized in the titration?
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