You need to prepare 300 mL of a 0.5 M phosphate buffer at pH = 6.8 using solid Na₂HPO4 and 1.0 M HCl. How many grams of solid Na₂HPO4 are required and how many milliters of 1.0 M HCI? The M.W of Na₂HPO4 is 141.96 g/mol and the pKa of H₂PO4 is 7.2.

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You need to prepare 300 mL of a 0.5
M phosphate buffer at pH = 6.8 using
solid Na₂HPO4 and 1.0 M HCl. How
many grams of solid Na₂HPO4 are
required and how many milliters of
1.0 M HCI? The M.W of Na₂HPO4 is
141.96 g/mol and the pKa of H₂PO4
is 7.2.
Transcribed Image Text:You need to prepare 300 mL of a 0.5 M phosphate buffer at pH = 6.8 using solid Na₂HPO4 and 1.0 M HCl. How many grams of solid Na₂HPO4 are required and how many milliters of 1.0 M HCI? The M.W of Na₂HPO4 is 141.96 g/mol and the pKa of H₂PO4 is 7.2.
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