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9 September, 10:42

2. The product of the hydrogen ion and the hydroxide ion concentrations must always be equal to a constant value. What is this numerical constant?

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  1. 9 September, 10:45
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    1*10^-14 mol^2dm^-6

    Explanation:

    Ionic product is defined as the product of the concentrations of ions, each raised to the power specified by its stoichiometric coefficient in a solution. The product of concentrations of H + and OH - ions in water at a particular temperature is known as ionic product of water. The value of Kw increases with the increase of temperature, i. e., the concentration of H + and OH - ions increases with increase in temperature. The value of Kw at 25°C is 1 x 10-14.

    At any given time, the amount of hydrogen ions and hydroxide ions present in water is extremely small and consequently the concentration of undissociated water molecules is almost unchanged by any minute ionization thus it is considered a constant. The product of the concentration of both hydrogen and hydroxide ions is a constant referred to as the ionic product for water.
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