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Calculate the pH of a phosphate buffer that is prepared by adding 16.1 mL of 50.0 mM NaH2PO4 to 19.4 mL of 50.0 mM Na2HPO4?

Calculate the pH of a phosphate buffer that is prepared by adding 16.1 mL of 50.0 mM NaH2PO4 to 19.4 mL of 50.0 mM Na2HPO4? The pKa of H2PO4- = 6.82

Henderson-Hasselbalch equation - please show work! thank you!!

Calculate the pH of a phosphate butler that is prepared by adding 16.1mL of 50.0mMNaH2PO4 to 19.4mL of 50.0mMNaHPO4 ? The pKKa of H2PO4+=6.82

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