Reaction Rates and Chemical Equilibrium 211 When water was a

Reaction Rates and Chemical Equilibrium 211 When water was added to the anhydrate of CuSO,(s), did the reaction proceed in the direction of the reactants or products? 06 B.2 Reaction of Copper(ll) lon and Hydroxide Test tube 1 Test tube2 Initial color of CuCl, solution ()hautsine Initial appearance Cu(OH)2(s) (2)| YdVax, y Change in appearance (3) Change in appearance (4) clonay blue biue Q7 In test tube 1, did the addition of OH cause the reaction to go in the direction of the reactants or products? Explain. Q8 In test tube 2, did the addition of H3O cause the reaction to go in the direction of the reactants or products? Explain.

Solution

the net reaction is as follows:

CuCl₂ + 2 NAOH = Cu(OH)₂ + 2 NACl

(a)

when OH is added the reaction will go in the forward direction and the blue color is observed due to the more abount of reactants that the product. More number of OH would be avalable in the solution to react with the CuCl₂ to form product.

(B)

when H₃O is added to the solution the Cu(OH)₂ formation will be surpreseed as the more amount of NaCl would be available due to the reaction of H₃O and NaOH. This makes the less avalablility of the reactants and the reaction will shift to the reacts.