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    How much of each stock would you need for 100 ml of buffer?

    I don't really know how to do this question - please help! You are running a biochemical assay with an enzyme that needs to maintain a constant pH of 6.6 in order to operate effectively. Using starting stock solutions of 0.2M of NaH2PO4 and Na2HPO4, how much of each stock would you need for 100...