Asked by Reede Burnett on May 20, 2024
Verified
In the reaction HA ⇌ H+ + A-, what is the value of K if [HA] = 0.200 M and [A-] = [H+] = 0.020 M?
A) 0.0004
B) 0.200
C) 0.010
D) 0.002
Equilibrium Constant
A value that expresses the ratio of the concentration of the products to the concentration of the reactants at equilibrium, indicating the extent of a chemical reaction.
- Comprehend the numerical expression of the equilibrium constant (K) and its significance for chemical equilibria.
Verified Answer
JL
Jacob LandryMay 27, 2024
Final Answer :
D
Explanation :
The equilibrium constant KKK for the reaction HA⇌HS++A−HA \rightleftharpoons HS^+ + A^-HA⇌HS++A− is given by K=[HS+][A−][HA]K = \frac{[HS^+][A^-]}{[HA]}K=[HA][HS+][A−] . Substituting the given concentrations, K=(0.020)(0.020)0.200=0.00040.200=0.002K = \frac{(0.020)(0.020)}{0.200} = \frac{0.0004}{0.200} = 0.002K=0.200(0.020)(0.020)=0.2000.0004=0.002 .
Learning Objectives
- Comprehend the numerical expression of the equilibrium constant (K) and its significance for chemical equilibria.