A chemist dissolves 16mmol of a nucleoside diphosphate, CDP, in 1L of an aqueous solution containing Mg2+ and buffers the solution at pH 8.7. The chemist monitor the reaction by measuring the amount of inorganic phosphate produced. No reaction is detected for 30mins, then the reaction proceeds at a constant rate until it stops with a final HPO42- concentration of 8mM. The recovered polymer contains 7.5mmol of cystosine
The pKa for the disassociation of H2PO4- to HPO42- is 6.7. What is the initial ratio of [HPO42-]:[H2PO4-] in the buffer solution of experiment?
The Attempt at a Solution
There are a few gen-chem assumptions in question that in this question that im not understanding. First though, am i right in saying that 16mmol in 1L aqueous solution = .016M?