Determine the weight, in grams, of NaH2PO4H2O (MM 138g/mol) and Na2HPO4 (MM 142 g/mol) needed to prepare 500 mL of a standard buffer at pH 7.00 with a total phosphate concentration of 0.15 M. Sol full and complete procedure

Determine the weight, in grams, of NaH2PO4H2O (MM 138g/mol) and Na2HPO4 (MM 142 g/mol) needed to prepare 500 mL of a standard buffer at pH 7.00 with a total phosphate concentration of 0.15 M. Sol full and complete procedure

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter25: Ph Measurements-buffers And Their Properties

Section: Chapter Questions

Problem 5ASA

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Step 1: Introduce Hasselbalch-Henderson

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Step 2: Solve the Hasselabalch-Henderson equation

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Step 3: Determine concentration of H2PO4- and HPO42-

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Step 4: Determine mass of NaH2PO4H2O

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Step 5: Determine mass of Na2HPO4

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