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1. 1.0678g of a standard iron(ii) ammonium sulfate, (NH4)2Fe(SO4)2. 6H202 requires 35.50mL of permanganate solution for titration. calculate the molary of the permanganate solution.

2. if 2.0500g of iron unknown required 30.00mL of the above permanganate solution. Calculate the % Fe in the sample.

3. What is the purpose of using sulfuric acid?

4. If the unknown sample had not been dried and it had absorbed water. How would this affect the percentage of iron in the sample?

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