(115 pts.) Ferrous nitrate reacts with silver nitrate in aqueous solution to form ferric nitrate and metallic silver according to the chemical equation

Fe(NO3)2(aq) + AgNO3(aq) + Fe(NO3)3(aq) + Ag(s),

for which K = 3.0.

(a) Derive the net ionic equation for this reaction.

(b) Determine whether the reaction is a replacement reaction or an oxidation-reduction

reaction, and, in the latter case, identify the oxidizing and reducing agents.

(c) Write the expression for Q in terms of the activities (the [] symbols) of the species

responsible for driving the reaction to equilibrium.

Explanation:

a )

Fe(NO₃)₂(aq) + AgNO₃(aq)   =   Fe(NO₃)₃(aq) + Ag(s)

Fe⁺² + 3NO₃⁻ + Ag⁺  = Fe⁺³ + Ag + 3NO₃⁻

b )

Reaction is an oxidation - reduction reaction .

oxidation :--

Fe⁺² = Fe⁺³ + e⁻

Reduction : ---

Ag⁺ + e = Ag

c )

Q =  [ Fe( NO₃)₃ ]  /  [ Fe(NO₂) ] [ AgNO₃ ]

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