Question

1. (25 pts) While doing field work, an environmental engineer accidentally spilled the Nitric acid they brought to acidify samples for metals analysis. Unphased by their mistake, the engineer decided to use citric acid that was available at the local pool supply store. However, in their rush to get the acid quickly, the engineer purchased sodium citrate. Assuming there are no other pH active species (buffers of any sort) in the water samples, what would the final pH of the water be if the final concentration of sodium citrate in the sample is 100 mM. Solve algebraically. You may use ICE tables or PC-pH diagrams to check you answer, but the full algebraic solution with the necessary derivations and simplifying assumptions must be shown to obtain full credit.

Answer 1

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