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10 March, 14:38

Calculation of ph from hydrogen ion concentration what is the ph of a solution that has an h1 concentration of (a) 1.75 3 1025 mol/l; (b) 6.50 3 10210 mol/l; (c) 1.0 3 1024 mol/l; (d) 1.50 3 1025 mol/l?

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  1. 10 March, 17:16
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    Solutions:

    Case a: Finding pH for [H⁺] = 1.75 * 10⁻⁵ mol/L:

    As we know pH is given as,

    pH = - log [H⁺]

    Putting value,

    pH = - log [1.75 x 10⁻⁵]

    pH = 4.75

    Case b: Finding pH for [H⁺] = 6.50 * 10⁻¹⁰ mol/L:

    As we know pH is given as,

    pH = - log [H⁺]

    Putting value,

    pH = - log [6.50 * 10⁻¹⁰]

    pH = 9.18

    Case c: Finding pH for [H⁺] = 1.0 * 10⁻⁴ mol/L:

    As we know pH is given as,

    pH = - log [H⁺]

    Putting value,

    pH = - log [1.0 * 10⁻⁴]

    pH = 4

    Case d: Finding pH for [H⁺] = 1.50 * 10⁻⁵ mol/L:

    As we know pH is given as,

    pH = - log [H⁺]

    Putting value,

    pH = - log [1.50 * 10⁻⁵]

    pH = 4.82
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