Given the Following Acid Dissociation Constants: K_a (H₃PO₄)= 7

question 95

Multiple Choice

Given the following acid dissociation constants: K_a (H₃PO₄) = 7.5 × 10^-3
K_a (NH₄⁺) = 5.6 × 10^-10
Determine the equilibrium constant for the reaction below at 25 °C.
H₃PO₄(aq) + NH₃(aq) NH₄⁺(aq) + H₂PO₄−(aq)

• A) 4.2 × 10^-12
• B) 7.5 × 10^-8
• C) 4.2 × 10²
• D) 1.3 × 10⁷
• E) 2.4 × 10¹¹

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Definitions:

Demand Elastic

Referring to a situation where the quantity demanded of a good or service significantly changes in response to a change in its price.

Price-Elasticity Coefficient

A numeric value that measures how much the quantity demanded of a good responds to a change in the price of that good, indicative of its price sensitivity.

Price Reduction

A decrease in the selling price of goods or services, often intended to stimulate demand or respond to competitive market pressures.

Price Elasticity

The measure of how responsive the quantity demanded or supplied of a good or service is to a change in its price.