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6 Oct 2020
Tartaric acid is a weak diprotic fruit acid with Ka1 = 1.0 x 10-3 and Ka2 = 4.6 x 10-5.
(a) Letting the symbol H2A represent tartaric acid, write the chemical equations that represent Ka1 and Ka2. Write the chemical equation that represents Ka1 x Ka2.
(b) Qualitatively describe the 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.
Tartaric acid is a weak diprotic fruit acid with Ka1 = 1.0 x 10-3 and Ka2 = 4.6 x 10-5.
(a) Letting the symbol H2A represent tartaric acid, write the chemical equations that represent Ka1 and Ka2. Write the chemical equation that represents Ka1 x Ka2.
(b) Qualitatively describe the 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.
Kenneth DuqueLv10
3 Dec 2020
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