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# Chemical equilibrium

## Exercise 12

Write the expression of constant $K$ for the equilibrium: $2H_2O_2(g)$ $2H_2O(l)$ $+$ $O_2(g)$ $ZnO(s)$ $+$ $CO(g)$ $Zn(s)$ $+$ $CO_2(g)$ $AgCl(s)$ $+$ $Br^-(aq)$ $AgBr(s)$ $+$ $Cl^-(aq)$ $CuSO_4\cdot5H_2O(s)$ $CuSO_4(s)$ $+$ $5H_2O(g)$