Fe^3+(aq)+SCN^-(aq)-> FeSCN^2=(aq) <- colourless colourless red/orange Explain i

Question

Fe^3+(aq)+SCN^-(aq)->  FeSCN^2=(aq)

                                     <-

colourless   colourless     red/orange

Explain in terms of lechateliers principle:

1) a) iron(III) Nitrate is added

    b) sodium thiocyanate is added

2)qualitative observations upon the addition of sodium hydroxide solution what did you see and explain how it was an application of le chateliers principle?

3)give 2 additional aqueous solutions that would cause the equilibirum to shift to form more products

4)give 2 aqueous solutions that would cause the equilibrium to shift to form more reactants

5) is the forwards reaction endothermic or exothermic, explain?

Explanation / Answer

1) a) iron(III) Nitrate is added......forwerdrection favours

b) sodium thiocyanate is added........forwerdrection favours


2)qualitative observations upon the addition of sodium hydroxide solution what did you see and explain how it was an application of le chateliers principle?

rection in forwerd direction decreases
3)give 2 additional aqueous solutions that would cause the equilibirum to shift to form more products
additon of Fe(+3) and SCN^-

4)give 2 aqueous solutions that would cause the equilibrium to shift to form more reactants
decrease in amount of Fe(+3) and increase in amount of FeSCN^-

5) is the forwards reaction endothermic or exothermic, explain?

we can answer for this if we have data DH however if DH =+ve endothermic and if DH = -ve is exothermic

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