A chemist makes a solution of NaOH for use in an experiment. She dissolves 0.00500 mol NaOH in 1.00 L H2O. The NaOH completely dissociates to form a solution with [OH− ] = 0.00500 M. What is the pOH of this solution?0.005005.002.30–2.30
Answer
A
0.00500
B
5.00
C
2.30
D
–2.30
Explanation
Use pOH = −log[OH⁻]. Substituting the hydroxide concentration gives pOH = −log(0.00500) = 2.30. Therefore, the pOH is 2.30, choice C.
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