Question

Open with Google Docs The reaction to the right describes the isomerization of dihydroxyacetone phosphate (DHAP) to glyceraldehyde-3-phosphate (GAP). It is a chemical equilibrium reaction that happens in the biochemical pathway that is part of the metabolism of glucose. The chemical equilibrium can be treated much like the dynamic equilibrium observed for the vapor pressure. Answer the following questions about this reaction: OH DHAP GAP GAP and the kinetics of GAP DHAP are first order processes. What are the rate Assume that the kinetics of DHAP laws for each of these processes? What can be said of the rates that you wrote above when the overall equilibrium reaction is al equilibrium? Write a mathematical expression that relates the two. Then solve for the ratio of rate constants kl/k-1, which also known as the equilibrium constant, K. What does this mean with respect to the concentration of products and reactants at equilibrium? Calculation of K: Equilibrium constant (K) can be calculated if the concentrations (M) of all the R& Pat equilibrium are known SO2(g) + NO2(B) S03 () + NO (8) What is the value of K for the above reaction if a reaction vessel at equilibrium contains What is the equilibrium concentration of NO in the other three species had concentrations of 0.15 M? Page 2 : 5 +

Answer 1

Last Question.

Let 'x' = equilibrium [CH3COO^-] = equilibrium [H3O⁺]

Then, equilibrium [HCH3COO] = (0.83-x) M

Now, Kc = [CH3COO^-][H3O⁺]/[HCH3COO]

i.e. 1.8*10^-5 = x*x/(0.83-x)

Here, (0.83-x) ~~ 0.83

i.e. x² = 1.8*10^-5 * 0.83 = 0.00001494

i.e. x = 0.003865 M

Therefore, equilibrium [CH3COO^-] = equilibrium [H3O⁺] = 0.003865 M

And equilibrium [HCH3COO] = (0.83-0.003865) M = 0.826135 M