Tamilnadu BoardEnglish MediumSTD 12ChemistryIonic Equilibrium2 Marks
Question
Define the ionic product of water. Give its value at room temperature.
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Answer
1. The product of the concentration of $H ^{+}$and $OH ^{-}$ions in water at a particular temperature is known as an ionic product.2. The ionic product of water at room temperature $\left(25^{\circ} C \right)$ is,
$K_{w}=\left[H^{+}\right]\left[OH^{+}\right] \text {(or) }$
$K_{w}=\left[H_3 O^{+}\right]\left[OH^{+}\right]$
$K_{w}=\left(1 \times 10^{-7}\right)\left(1 \times 10^{-7}\right)$
$K_{w}=1 \times 10^{-14} mol^2 dm^{-6}$
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