2. The popular antacid, Milk of Magnesia, is a suspension of magnesium hydroxide

Question

2. The popular antacid, Milk of Magnesia, is a suspension of magnesium hydroxide, Mg(O), In water, m hydroxide, Mg(OH)2. In water, (Eq. 9) (1) What would you observe if you added an acid to an equilibrium mixture containing Mg(OHD, in Mg(OH)2 undergoes the reaction shown in Equation 9. Mg(OH)2(s, white) Mg2+ (aq) +2OH-(aq) Mg(OH)2(s, white) Mg* (aq) + 20H (aq) water? (2) Write a chemical equation that accounts for the effect of the added acid. (3) Briefly explain how your answer to (1) is consistent with Le Chatelier's principle.

Explanation / Answer

Mg(OH)2 -------> Mg+2   + 2OH-

By the addition of Acid which gives H+ ions combine with OH- ions to form unionisable water. So concentration of OH- ion decreases. So equilibrium shift to right side.

2H+ + 2OH- -------> 2H2O

According Le-chat lier's principle concentration of products are decreases the equilibrium shift to right side.

So by the addition of acid the equilibrium shift to right side.

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