The Ka value of HCl is 107 what is its pKa value?
Correct answer: B. -7
- A. 107
- B. -7
- C. 7
- D. Log 7
Explanation
To find the pKa value from the Ka value, use the formula pKa = -log(Ka). Given Ka = 107, the calculation becomes pKa = -log(107) = -7. This is why Option B is correct. Option A incorrectly implies no negative log transformation, Option C suggests a smaller Ka value, and Option D misunderstands the use of logarithms in this context.
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