None How much HEPES - acid (in grams) and 2M NaOH (in mL) are needed to make 500mL of a 0.3MHEPES buffer at pH 7.35?

To prepare 500 mL of a 0.3 M HEPES buffer at pH 7.351, we need to calculate the required amounts of…

Answered: How much HEPES - acid (in grams) and 2M…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter15: Additional Aqueous Equilibria

Section: Chapter Questions

Problem 21QRT: Calculate the mass in grams of ammonium chloride, NH4C1, that would have to be added to 500. mL of...

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8-71 Explain why you do not need to know the chemical formula of a buffer compound to use it.
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Tartaric acid is a weak diprotic fruit acid with Ka1 = 1.0 103 and Ka2 = 4.6 105. a Letting the symbol H2A represent tartaric acid, write the chemical equations that represent Ka1 and Ka2. Write the chemical equation that represents Ka1 Ka2. b Qualitatively describe the relative concentrations of H2A, HA, A2, and H3O+ in a solution that is about 0.5 M in tartaric acid. c Calculate the pH of a 0 0250 M tartaric acid solution and the equilibrium concentration of [H2A]. d What is the A2 concentration in solutions b and c?
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How much HEPES - acid (in grams) and 2M NaOH (in mL) are needed to make 500mL of a 0.3M HEPES buffer at pH 7.35?