What is the hydroxide [OH-] concentration of a solution that has a pOH of 4.90? 14 14 1.26 x10-5 1.26 x10, -5 9.1 9.1 7.94 x 104

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What is the hydroxide [OH-] concentration of a solution that has a pOH of 4.90? 14 14 1.26 x10-5 1.26 x10, -5 9.1 9.1 7.94 x 104

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Gia Bảo 5 years 2021-08-19T12:00:22+00:00 1 Answers 34 views 0

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  1. nguyetanh
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    2021-08-19T12:01:28+00:00
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    Answer:

    The hydroxide [OH-] concentration of the solution is 1.26*10⁻⁵ M.

    Explanation:

    The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution.

    POH indicates the concentration of hydroxyl ions [OH-] present in a solution and is defined as the negative logarithm of the activity of hydroxide ions (that is, the concentration of OH- ions):

    pOH= -log [OH-]

    A solution has a pOH of 4.90. Replacing in the definition of pOH:

    4.90= -log [OH-]

    Solving:

    -4.90= log [OH-]

    1.26*10⁻⁵ M= [OH-]

    The hydroxide [OH-] concentration of the solution is 1.26*10⁻⁵ M.

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