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16 September, 19:48

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red wine has a pH of 3.5, and a certain Italian white wine has a pH of 2.9. Find the corresponding hydrogen ion concentrations of the two wines. (Enter your answers to five decimal places.)

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  1. 16 September, 23:10
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    The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

    The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

    Explanation:

    Step 1: Data given

    Wine 1 has a pH of 3.5

    Wine 2 has a pH of 2.9

    Wine 2 is more acid so should have more hydrogen ions

    Step 2: Calculate hydrogen concentration

    pH = - log [H+]

    Wine 1: pH = 3.5 = - log[H+]

    [H] = 10 ^-3.5 M = 0.00032 M

    Wine 2: pH = 2.9 = - log[H+]

    [H+] = 10^-2.9 = 0.00126 M

    The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

    The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

    The italian white wine has a higher concentration of hydrogen ions, what means it's more acid than the californian red wine.
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