Question

Calculate the equilibrium constant for each of the reactions at 25 ∘C. 2Cr3+(aq)+3Sn(s)→2Cr(s)+3Sn2+(aq) O2(g)+2H2O(l)+2Cu(s)→4OH−(aq)+2Cu2+(aq) Br2(l)+2I−(aq)→2Br−(aq)+I2(s)