[Xiao-Bing]

I need solution for those 2 question.My chemistry notes = rubbish.No direct link to qns.Made me spent 2 hrs stuck on those qns.Pls help!Homework due on Friday.Exam coming soon too.I need to learn this fast.

Qn6.Calculate x in the formula FeSO4.xH20 from the following data: 24.40 g of iron (ii) sulphate crystals were made up to 1dm³ of aqueous solution of acidified with sulphuric acid. 25.0 cm³ of this solution required 20.0cm³ of 0.0220 mol/dm³ KMnO4-

Qn7.A 25.0 aliquot of a solution containing Iron (ii) ions and Iron (iii) ions was acidified and titrated against potassium manganate solution.15.00 cm³ of a 0.0200mol/dm³ solution of potassium mangante (Vii) was required. A second 25.0 cm³ aliquot was reduced with zinc and titrated against the same mangante (Vii) solution. 19.00 cm³ of the oxidant solution were required. Calculate the concentration of (a)iron (ii) ions and
    (b)Iron (iii) ions in solution

[Borek]

Start with the reaction equation.

http://www.chembuddy.com/?left=balancing-stoichiometry&right=half-reactions-method

[Xiao-Bing]

Thx alot!I got it!