What is the equilibrium constant...?

Question

What is the equilibrium constant and ∆G° for the reaction between:

I2 (s) and Br(-) (aq)

*I'm not getting this

Answer 1

Right down the balance equation.

Look up DeltaG0f for Br- and I- (DeltaG0f for I2 and Br2 is 0; why?)

Use DeltaG0(reaction) = sum{DeltaG0products} - sum{DeltaG0reactants}

Finally, use

DeltaGo(reaction) = - RT ln K

Fiddly arithmetic.  To avoid common mistakes, remember to convert kJ to J,  and of course T is Kelvin.

Over to you.  Good luck.