When a Small Amount of HCl or NaOH Is Added

question 92

Multiple Choice

When a small amount of HCl or NaOH is added to a solution of Na₂HPO₄, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na₂HPO₄, except

• A) Na₂HPO₄ is able to accept extra hydrogen ions from the HCl.
• B) Na₂HPO₄ adsorbs excess H⁺ and OH^- directly onto the surface of its crystalline structure.
• C) Na₂HPO₄ is able to donate hydrogen ions to the OH^- from NaOH.
• D) Na₂HPO₄ acts as a buffer.
• E) Na₂HPO₄ is a salt formed from reacting a strong base with a weak acid.

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Definitions:

Price Searchers

Firms that face a downward-sloping demand curve for their product. The amount the firm is able to sell is inversely related to the price it charges.

Price Takers

Sellers who must take the market price in order to sell their product. Because each price taker's output is small relative to the total market, price takers can sell all their output at the market price, but they are unable to sell any of their output at a price higher than the market price.

Market Demand

The total demand for a product or service in a market, summing up individual demands at each price level.

Profit-Maximizing Output

The level of production at which a company can achieve the highest possible profit, considering its cost structure and market demand.