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18 Nov 2019
Write the equilibrium constant expression for: a. the K_a of acetic acid. b. the K_a of benzoic acid. c. the K_b of Tris-base. Explain why the procedure in the lab calls for you to use an analytical balance and a volumetric flask to prepare the solution for this lab, instead of a top-loading balance and a graduated cylinder. The lab procedure uses a 100 mL beaker to contain the solution during the pH measurement. Why does the lab procedure call for you to rinse out the beaker with your actual solution before you make the pH measurement? Why can't you just use water to rinse the beaker? Briefly explain how to find [H_3O^+] and [OH^-] from a known value of pH.
Write the equilibrium constant expression for: a. the K_a of acetic acid. b. the K_a of benzoic acid. c. the K_b of Tris-base. Explain why the procedure in the lab calls for you to use an analytical balance and a volumetric flask to prepare the solution for this lab, instead of a top-loading balance and a graduated cylinder. The lab procedure uses a 100 mL beaker to contain the solution during the pH measurement. Why does the lab procedure call for you to rinse out the beaker with your actual solution before you make the pH measurement? Why can't you just use water to rinse the beaker? Briefly explain how to find [H_3O^+] and [OH^-] from a known value of pH.
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Jamar FerryLv2
24 Aug 2019
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