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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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If the pH of an acid is 1.5, then what is the pOH of its conjugate base?

12.5
1.5
7
10.5
14

Explanation

Answer: A - For any given compound, the pH of the acid + pOH of the conjugate base must equal 14. Thus, if the pH is 1.5, a relatively strong acid, we expect the pOH of the conjugate base to be high, because it will be a weak base. 14-1.5 is 12.5, in this problem.

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FCAT Grade 8 Science Assessment Practice Questions

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