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7 November, 06:54

Yogurt has an approximate pH of 5 and vinegar has an approximate pH of 3. How many times more acidic is vinegar compared to yogurt in terms of concentration?

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  1. 7 November, 07:07
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    The vinegar is highly acidic by 100 times than yogurt.

    Explanation:

    ∵ pH = - log[H⁺]

    The concentration of H⁺ in yogurt:

    ∵ pH = - log[H⁺]

    ∴ 5 = - log[H⁺]

    ∴ [H⁺] = 1.0 x 10⁻⁵ M.

    The concentration of H⁺ in vinegar:

    ∵ pH = - log[H⁺]

    ∴ 3 = - log[H⁺]

    ∴ [H⁺] = 1.0 x 10⁻³ M.

    the ratio of H⁺ in vinegar to that in yogurt = 1.0 x 10⁻³ M / 1.0 x 10⁻⁵ M = 100.0.

    ∴ The vinegar is highly acidic by 100 times than yogurt.
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