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11 Nov 2019
Show all work and answer the following using the correct number of significant figures. [Note: Since this is a take-home quiz and aren't limited by class time, if you need to use the quadratic equation, I expect you do actually do the calculation.] (10 pts) Carbonic acid (H2CO3, Ka 4.46 x 10-7, Ka2 4.69 x 10-11) is a diprotic acid. A titration is performed when 25.00 mL of 0.1250 M disodium carbonate (Na2CO3) is reacted with 0.1535 M HCI. What is the pH at the following points along the titration curve? [Attach a separate sheet if necessary.] a) The initial pH b) 5.00 mL before the first equivalence point c) At the first equivalence point d) 5.00 mL after the first equivalence point e) At the second equivalence point f) 1.00 mL after the second equivalence point
Show all work and answer the following using the correct number of significant figures. [Note: Since this is a take-home quiz and aren't limited by class time, if you need to use the quadratic equation, I expect you do actually do the calculation.] (10 pts) Carbonic acid (H2CO3, Ka 4.46 x 10-7, Ka2 4.69 x 10-11) is a diprotic acid. A titration is performed when 25.00 mL of 0.1250 M disodium carbonate (Na2CO3) is reacted with 0.1535 M HCI. What is the pH at the following points along the titration curve? [Attach a separate sheet if necessary.] a) The initial pH b) 5.00 mL before the first equivalence point c) At the first equivalence point d) 5.00 mL after the first equivalence point e) At the second equivalence point f) 1.00 mL after the second equivalence point
Reid WolffLv2
3 Sep 2019