Question

mic, gois backward and heat Prene st half is Ende thermic gois backwal shifts it to the risht marks the blue color ice marks it shift left The popular antacid, Milk of Magnesia, is a suspension of magnesium hydroxide, Mg(OH)2. In water, Mg(OH)2 undergoes the reaction. 2. Mg(OH)2(s, white) 5 Mg²+ (aq) + 2OH(aq) () What would you observe if you added an acid to an equilibrium mixture containing Mg(OH)2 in water? (b) Write a chemical equation that accounts for the effect of the added acid. (See the prelab for the reaction between an acid and a base.) (c) Briefly explain how your answer to 2(a) is consistent with Le Châtelier's principle.

Answer 1

La Here Mg(OH)2 is a base (because it gives off om in aqueous solution), Acid give 4* ion in aqueous solution se when acid is added to this equilibrium mixture, Ht will combine whict OH to form M20 (water) molecule, This is called "neutralizabion" reaction and produce. heat fexothermich. As a result the reaction mixture become hot and more of Mg(OH)2 will dissolve, Chemical equation - H u OH' > H2O According to Le Chatelier's principle, when the concentration of substance elecreases than egural equillibrium shifts in the direction of substance which is decreasing. When acid is added, H t combine with Oh when decrease the concentration of om. Hence, equilibrium shifts in right side and dissolve more of Mg(OH), . (b) ( C L