Problem: The following three diagrams represent three different solutions of the binary acid HA. Water molecules have been omitted for clarity and hydronium ions (H3O+) are represented by hydrogen ions (H+). Rank the acids in order of decreasing acid strength.

FREE Expert Solution

Recall that:

  • Strong acid dissociates completely — HA → H+ + A-
  • Weak acid dissociates partially — HA H+ + A-
    • The weaker the acid, the lesser the dissociation.


We are given the following figure:

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Problem Details

The following three diagrams represent three different solutions of the binary acid HA. Water molecules have been omitted for clarity and hydronium ions (H3O+) are represented by hydrogen ions (H+). Rank the acids in order of decreasing acid strength.
Three samples of acid are pictured. Sample a is completley dissociated into cations and anions. Sample b contains three undissociated molecules, and the rest ions. Sample c contains nine undissociated molecules, and only a few ions.

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Our tutors have indicated that to solve this problem you will need to apply the Identifying Acids and Bases concept. You can view video lessons to learn Identifying Acids and Bases. Or if you need more Identifying Acids and Bases practice, you can also practice Identifying Acids and Bases practice problems.