Question

What happens when? (Give only the balanced equations of the reactions).

i. A small piece of Mg ribbon is added to the aq. Solution of FeSO4​

Answer 1

Answer:

Ferrous sulfate is FeSO4•nH2O, where n is 1, 4, 5, 6 or 7. Since 1, 5 and 6 are rare, I will use n = 7. Then,

Mg + FeSO4•7H2O = MgSO4•7H2O + Fe

Change in Free Energy: ΔG(20C) = -361.5kJ (negative, so the reaction runs)

Change in Enthalpy: ΔH(20C) = -374.1kJ (negative, so the reaction is exothermic)

NOTE: MgSO4•7H2O is commonly called Epsom salt.

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