Problem: Which solution is most acidic (that is, which one has the lowest pH)?(a) 0.10 M HCl(b) 0.10 M HF(c) 0.20 M HF

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We’re being asked to determine the most acidic solution (with the lowest pH). We need to calculate the pH of each of the solutions given.


(a) 0.10 M HCl

HCl is a strong binary acid. When getting the pH of a strong acid solution:

pH=-log [strong acid]pH=-log [HCl] pH=-log [0.10 M]

pH = 1.00


(b) 0.10 M HF

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Problem Details

Which solution is most acidic (that is, which one has the lowest pH)?
(a) 0.10 M HCl
(b) 0.10 M HF
(c) 0.20 M HF

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What scientific concept do you need to know in order to solve this problem?

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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Pierino's class at Colorado School of Mines.