i. 5. a) There are three interacting (competing) equilibria at work here: the barium chromate precipitate equilibrium (written for question 4) ii. the chromate-dichromate equilibrium 2 Cro. (aq) + 2 H+ (aq) + Cr20.-(aq) + H200) iii. the acid-base equilibrium H(aq) + OH-(aq) = H2O(l) Write these three chemical reactions Goined together) showing how the equilibria interact. For an example see the "Interacting Equilibria" section in the introduction. Number the equations 1, 2 and 3 so that you can refer to them when answering the next question. (2 marks) SHO b) The BaCro. precipitate reformed when NaOH(aq) was added. Using your answer to Question 5a, describe, in detail, why this happened and show (using arrows next to the reactions that you wrote above) how the three equilibria would shift. (3 marks) Youlon