Topic 6. Chemical equilibrium Var. 12 1. For a homogeneous chemical process AlCl3(aq)+H2O(l)AlOHCl3(aq)+HCl(aq) a) write the expressions of the law of mass action (K2, also Kc or Kp); b) indicate the change in what factors (concentration of reagents, pressure, temperature) will lead to a change in the value of the thermodynamic equilibrium constant; c) indicate the direction of the equilibrium shift with increasing pressure in the fystem. 2. The same task as in 1, but for a heterogeneous process NH4NO2(s)N2(g)+2H2O(g) 3. Write down the equation for weak acid dissociation HCOOH and the cxpression for the equilibrium constant. Calculate pH of this bolution if C=0,12mol/L,Kd=1,8104 4. For salts prone to hydrolysis, write the molecular and ion-molecular equations of hydrolysis: NaHSiO3,Cu(NO3)2,NaBr 5. Write down the equation of lieterogeneous equilibrium and the expression of the law of mass action for a solution of a poorly soluble comporand Ag2CrO4 Calculate the solubility of the compound and the concentration of metal ions in the saturated solution (mol L) from the solubility product SP=4,41012