Page 779 - Chemistry--atom first
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Chapter 14 | Acid-Base Equilibria 769
Step 1. Determine the concentrations of and
As for the ionization of any other weak acid:
An abbreviated table of changes and concentrations shows:
Substituting the equilibrium concentrations into the equilibrium gives us:
Solving the preceding equation making our standard assumptions gives:
Thus:
Step 2. Determine the concentration of in a solution at equilibrium with and
both equal to 1.2 10−4 M.
To summarize: In part 1 of this example, we found that the H2CO3 in a 0.033-M solution ionizes slightly
