Topic: Titration problem. (Read 5193 times)

aldoxime_amine · « **on:** January 26, 2009, 09:36:46 AM »

mineral was analysed for

and

percentage. 10g of it was boiled with dil. sulphuric acid and diluted to 1L. 10 ml of this solution required 2 ml of 0.01 M

in acidic medium. IN another titration, 25 ml of the same solution required 5 ml of 0.01 M

solution iodometrically. Calculate percentage of Cu and Fe in the mineral.

I just don't know what reactions are taking place, so calculation of the valency or no. of equivalents is impossible.

Borek · « **Reply #1 on:** February 01, 2009, 04:06:10 AM »

Permanganate part is obvious - this is a standard method of determining one of the elements present in the compound.

What happens to Cu²⁺(aq) when treated with iodide?

aldoxime_amine · « **Reply #2 on:** February 01, 2009, 02:08:38 PM »

Let me put it this way:
What are the oxidation states of copper and iron in that mineral?

The iodometric one i'm aware of. Cu(II) is after all, to some extent an oxidant...

Borek · « **Reply #3 on:** February 01, 2009, 02:30:10 PM »

Quote from: aldoxime_amine on February 01, 2009, 02:08:38 PM

What are the oxidation states of copper and iron in that mineral?

Identical

aldoxime_amine · « **Reply #4 on:** February 01, 2009, 02:30:52 PM »

How do you say that?

Topic: Titration problem. (Read 5193 times)

aldoxime_amine

Titration problem.

Borek

Re: Titration problem.

aldoxime_amine

Re: Titration problem.

Borek

Re: Titration problem.

aldoxime_amine

Re: Titration problem.

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