a) What are the concentrations of Na2HPO4 and NaH2PO4 in a 0.30 M phosphate buffer solution pH 7.0? Use pka 6.82 b) Describe how you would prepare 250 mL of the buffer in part (a) given that you have available to you a 1.0 M stock solution of NaH2PO4 and solid Na2HPO4(FW 141.96 g/mol). Provide your answer in milliliters of NaH2PO4 and grams of Na2HPO4. c) Suppose you use 100 ml of this buffer in an experiment and 0.003 mol of H+ were generated as a result of the reaction. What would be the pH at the end of the reaction?
a) What are the concentrations of Na2HPO4 and NaH2PO4 in a 0.30 M phosphate buffer solution pH 7.0? Use pka 6.82 b) Describe how you would prepare 250 mL of the buffer in part (a) given that you have available to you a 1.0 M stock solution of NaH2PO4 and solid Na2HPO4(FW 141.96 g/mol). Provide your answer in milliliters of NaH2PO4 and grams of Na2HPO4. c) Suppose you use 100 ml of this buffer in an experiment and 0.003 mol of H+ were generated as a result of the reaction. What would be the pH at the end of the reaction?
Chemistry
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Chapter1: Chemical Foundations
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Transcribed Image Text:a) What are the concentrations of Na2HPO4 and
NaH2PO4 in a 0.30 M phosphate buffer solution pH
7.0? Use pka 6.82
b) Describe how you would prepare 250 mL of the
buffer in part (a) given that you have available to you
a 1.0 M stock solution of NaH2PO4 and solid
Na2HPO4(FW 141.96 g/mol). Provide your answer in
milliliters of NaH2PO4 and grams of Na2HPO4.
c) Suppose you use 100 ml of this buffer in an
experiment and 0.003 mol of H+ were generated as
a result of the reaction. What would be the pH at the
end of the reaction?
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