dissolving iron in sulphuric acid

Hi for an experiment i am dissolving cast iron in sulphuric acid to give Fe2+ ions how do i calculate the volume of sulphuric acid that i would need?

thanks alot

Reply 1

mizfissy815

12

Can you type down the whole question, with all the information given?

Do you know the concentration of the acid and the mass of the iron?

Reply 2

sarah12345

OP

2

mizfissy815

Can you type down the whole question, with all the information given?

Do you know the concentration of the acid and the mass of the iron?

there is no info given because all it says is to state suitable quantities of chemicals to use and calculations to show how you worked out these quanities

Im gonna use 2g of iron and 0.5mol dm-1 sulphuric acid but i dont know how they react all i know is that i need teh acid in excess so that it all dissolves

Reply 3

mizfissy815

12

Fe(s) + H₂SO₄ (aq) ----> FeSO₄ (aq) + H₂ (g)

Mole of Fe(s) = Moles of H₂SO₄....1:1 ratio
Calcualte moles of Fe(s)(therefore moles of H₂SO₄) and use that along with the concentration for H₂SO₄ to find the exact volume you'll need.

Reply 4

sarah12345

OP

2

mizfissy815

Fe(s) + H₂SO₄ (aq) ----> FeSO₄ (aq) + H₂ (g)

Mole of Fe(s) = Moles of H₂SO₄....1:1 ratio
Calcualte moles of Fe(s)(therefore moles of H₂SO₄) and use that along with the concentration for H₂SO₄ to find the exact volume you'll need.

o ok so then doesFeSO4 dissosiate into Fe2+ and SO4 2- ?

thanks alot

Reply 5

mizfissy815

12

Hmm...not really. FeSO4 (aq) is in a solution, so at this state it has Fe2+ and SO₄ 2- ions.