The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10^-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?

#Question id: 410

#1. Molecules and their Interaction Relevant to Biology

For the reaction A -> B, the Keq' is 10^4.  If a reaction mixture originally contains 1 mmol of A and no B, which one of the following must be true?

#Question id: 411

#1. Molecules and their Interaction Relevant to Biology

The reaction ATP -> ADP + Pi is an example of a reaction.

#Question id: 412

#1. Molecules and their Interaction Relevant to Biology

All of the following contribute to the large, negative, free-energy change upon hydrolysis of “high-energy” compounds except:

#Question id: 413

#1. Molecules and their Interaction Relevant to Biology

The hydrolysis of ATP has a large negative DG'°; nevertheless it is stable in solution due to:

#Question id: 414

#1. Molecules and their Interaction Relevant to Biology

The hydrolysis of phosphoenolpyruvate proceeds with a DG'° of about –62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of the product pyruvate by:

#Question id: 414

#1. Molecules and their Interaction Relevant to Biology

The hydrolysis of phosphoenolpyruvate proceeds with a DG'° of about –62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of the product pyruvate by: