Magnesium Hydroxide Is Used in Several Antacid Formulations $\degree$ C Is 89 *10¯¹²

question 45

Multiple Choice

Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions. The equilibrium constant at 25 $\degree$ C is 8.9 *10¯¹². One hundred grams of magnesium hydroxide is added to 1.00 L of water and equilibrium is established. What happens to the solution if another 10 grams of Mg(OH) ₂ are now added to the mixture?

• A) The hydroxide ion concentration will decrease.
• B) The hydroxide ion concentration will increase.
• C) The hydroxide ion concentration will be unchanged.
• D) The solution will become supersaturated.
• E) None of these conclusions is justified without additional information.

---

Definitions:

Legal Structure

The framework within which a business operates, including its designation as a corporation, partnership, sole proprietorship, or other legal entity.

Barrier To Entry

Factors that make it difficult for new competitors to enter a market, such as high start-up costs or regulatory hurdles.

Price-Control Legislation

Laws enacted by a government to regulate the prices charged for goods and services in the market, often to protect consumers.

Invisible Hand Principle

The tendency of market prices to direct individuals pursuing their own interests to engage in activities promoting the economic well-being of society.