Asked by Rheagan Fischette on May 27, 2024
Verified
An equilibrium reaction of the formula HA ⇌ H+ + A- has an equilibrium constant of 13.5 and a [H+] = 0.500 M. What is the value of [HA]?
A) 13.5 M
B) 54.0 M
C) 0.250 M
D) 0.018 M
Equilibrium Reaction
A chemical reaction in which the forward and reverse reactions occur at the same rate, so that the concentrations of the reactants and products do not change with time.
Equilibrium Constant
A numerical value that expresses the ratio of the concentrations of products and reactants of a chemical reaction at equilibrium.
HA
Often shorthand for hydroxyapatite, a mineral form of calcium apatite; can also refer to hyaluronic acid or other context-specific chemical compounds.
- Learn about the equilibrium constant (K) and how to calculate it for several types of reactions.
- Show proficiency in determining the concentration of reactants or products at equilibrium by utilizing the value of K.
Verified Answer
NT
Nguy?n TháiMay 29, 2024
Final Answer :
D
Explanation :
Given the equilibrium constant (K) is 13.5 and [H+] = 0.500 M, and assuming initial concentrations of products are zero, the change in concentration of HA will be equal to the concentration of H+ at equilibrium. Thus, K = [H+]^2 / [HA], solving for [HA] gives 0.018 M.
Learning Objectives
- Learn about the equilibrium constant (K) and how to calculate it for several types of reactions.
- Show proficiency in determining the concentration of reactants or products at equilibrium by utilizing the value of K.