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30 June, 08:44

Calculate the pH of a solution having the following ion concentrations at 298 K. [H+] = 4.6 * 10^-2 M

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  1. 30 June, 09:01
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    The pH of the solution is 1.34, being an acidic pH.

    Explanation:

    pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance. The acronym pH stands for hydrogen potential.

    The pH scale ranges from 0 to 14. Values less than 7 indicate the acidity range and those greater than 7 indicate alkalinity or basicity. Value 7 is considered neutral. Mathematically, pH is the negative logarithm of the molar concentration of hydrogen or proton ions (H⁺) or hydronium ions (H₃O⁺).

    pH = - log [H⁺] = - log [H₃O⁺]

    In this case, [H⁺] = 4.6*10⁻² M. Replacing:

    pH = - log 4.6*10⁻²

    Solving:

    pH = 1.34

    The pH of the solution is 1.34, being an acidic pH.
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