Question

Create a spreadsheet that is capable of automatically generating 2 plots (a vs. pH, logC-pH) for any diprotic acid using the total acid/base concentration (CT,A), total sodium (CT,Na), total chloride (CT,o), and the pKa value as input. Include lines for all three protonation states of the diprotic acid (112A, HA, and A). On the logC-pH plot, also include lines for log[11-1 and log[OH-] and lines for log[Nal and log[C1-]. You may assume zero ionic strength in the plot. Turn in the following items: (a) A list of the equations used to calculate each line in the plots (b) A single sheet of tabular data from the spreadsheet (c) Plots for 10-4 M TMP (d) Plots for 10-4 M TMP + 1.4x 10-4 M HC1 (e) Plots for 10-3 M NaHS (0 Plots for 10-3 M NaHS + 10-4 M NaOH (g) Solve for the pH of each of the solutions described in (c) — (f). Hint: you may need to rearrange the electroneutrality constraint if a clear solution is not readily visible. (h) Briefly mention how to use the same spreadsheet for monoprotic acids/bases. Formatting notes for the plots: (i) Scale the pH axis from 0 — 14. (ii) Scale the a axis from 0 — 1. (iii) Scale the logC axis from -14 to 0. (iv) Spacing between points should be 0.1 pH units or smaller. (v) Be sure and label the lines adequately.

Answer 1

Answer:

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