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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Clifj029 on June 25, 2019, 06:11:18 PM

Title: hard redox calculation
Post by: Clifj029 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)
Title: Re: hard redox calculation
Post by: Borek on June 26, 2019, 02:47:47 AM
What is being oxidized in the titration?