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`N/100` विलयन में KCN के जल-अपघटन की मात्रा `2.27xx 10^(-2)` है । यदि हाइड्रोसायनिक अम्ल का विघटन-स्थिरांक `1.3 xx 10^(-9)` हो, तो जल के आयनिक गुणनफल की गणना करें ।

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`h = sqrt((K_(w))/(K_(A).C))`
प्रश्नानुसार , `h = 2.77 xx 10^(-2), K_(A) = 1.3 xx 10^(-9), C = 10^(-2)`
`:. 2.77 xx 10^(-2) = sqrt((K_(w))/(1.3 xx 10^(-9) xx 10^(-2)))`
या `(K_(w))/(1.3 xx 10^(-11)) = (2.77 xx 10^(-2))^(2) = 7.67 xx 10^(-4)`
या `K_(w) = 7.67 xx 10^(-4) xx 1.3 xx 10^(-11)`
`= 9.971 xx 10^(-15)`.

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