Sulfate buffer? Your laboratory is out of materials to make phosphate buffer and you are considerifi, 971g sulfate to make a buffer instead. The pKapKa values for the two hydrogens in H2SO4H,SO4 are –10 -10 and 2. (a) Will this approach work for making a buffer effective near pHPH 7? (b) Around what PHPH might a sulfate-based buffer be useful?

Sulfate buffer? Your laboratory is out of materials to make phosphate buffer and you are considerifi, 971g sulfate to make a buffer instead. The pKapKa values for the two hydrogens in H2SO4H,SO4 are –10 -10 and 2. (a) Will this approach work for making a buffer effective near pHPH 7? (b) Around what PHPH might a sulfate-based buffer be useful?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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You are a formulation scientist preparing a semisolid topical scream. Your formulation requires that a 1000 mL solvent of pH 7.4 phosphate buffer be prepared to suit the pH of the skin. To prepare the buffer, you must use monobasic sodium phosphate (NaH2PO4) and sodium hydroxide (NaOH) since these two ingredients are compatible with your other ingredients in the cream. NaH2PO4 + NaOH → Na2HPO4 + H2O 1. The Ka of NaH2PO4 6.2 x 10-8. Using the Henderson-Hasselbalch equation, calculate the molar ratio of [conjugate base]/[weak acid] that must be used in preparing the buffer. 0.39 B. 0.78 C. 1.56 D. 2.34 2. There is an available 50 mL of 0.2M NaH2PO4 in the laboratory. Convert this first to the moles of NaH2PO4. The molar mass of NaH2PO4 is 119.98 g/mol. 0.005 mol B. 0.010 mol C. 0.025 mol D. 0.045 mol 3. Given the number of moles of NaH2PO4 available as computed above and the molar ratio calculated, which of the following moles of NaOH when added to NaH2PO4 will produce the…
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