The conductivity of a solution is generally affected by the concentration of ions present. Stronger acids fully dissociate in solution, producing more ions and thus higher conductivity, while weaker acids produce fewer ions and thus lower conductivity.
Given the pH values:
- HA (pH 5.6) is the weakest acid (higher pH)
- HC (pH 4.7) is a stronger acid than HA
- HB (pH 3.9) is the strongest acid (lower pH)
In terms of conductivity from least to most:
- HA (least conductive)
- HC
- HB (most conductive)
Therefore, the correct order from least conductive to most conductive is:
HA, HC, HB
So the answer is: HA, HC, HB
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