4. The sodium salt of this acid is sodium propanoate, C2H5COONa+(MW=96g/mol).A solution is prepared from 7.68g of sodium propanoate in 200mL of H2O. (a) Determine the molarity of the solution (before the acid-base equilibrium is established) (b) What are the major species in solution (before equilibrium is established)? 4(c). Write the chemical equation for the acid-base equilibrium of propanoate anion in water, and the expression for the equilibrium constant for this reaction. Note: you will want to think in terms of propanoate anion as a reactant (base) reacting with H2O. (d) Complete the ICE chart Balanced equation: Change Equilibrium (e) The value of the equilibrium constant, Kb, is 7.71010. Solve for [OH]and confirm the validity of any approximations you made. (f) Calculate the pH and the concentrations of all species in the solution