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CBSE Class 11-science Answered

Explain ionic product of water. What is the effect of temperature on Ionic product of water?
Asked by Topperlearning User | 16 Jun, 2016, 05:21: PM
answered-by-expert Expert Answer

Water is a weak electrolyte and ionizes to a very small extent forming [H+]

and [HO-] as follows.                   
                                             H2O   H+ + HO-
                                          

                                   Whereby, begin mathsize 11px style straight K space equals space fraction numerator left square bracket straight H to the power of plus right square bracket space left square bracket OH to the power of minus right square bracket over denominator left square bracket straight H subscript 2 straight O right square bracket end fraction end style

  Or,                              K. [H2O] = [H+] [HO-]
 
  Or,                             Kw = [H+] [HO-]
Where Kw is known as ionic product of water. The value of Kw at 298 k is about 1.0x 10-14 M2.
 
The value of Kw changes with temperature.
Answered by | 16 Jun, 2016, 07:21: PM

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