Q34 / 220 · NTA Abhyas (NEET) 2020 · Chemistry · Ionic Equilibrium

The sodium salt of a weak acid is hydrolysed to the extent of 3% in 0.1 M solution in water at 25°C . If Ka for weak acid is 1.3×10-10 . The ionic product of water is

  • Correct answer
    A
    1.17×10-14
  • B
    1.17×1014
  • C
    11.7×10-14
  • D
    11.7×10-10

Solution

KH=α2C
hydrolysis α = degree of
=(0.03)2×0.1=9×10-5
KH=KwKa
or Kw=KH×Ka
=9×10-5×1.3×10-10
=1.17×10-14.

Hence, the correct answer is option: 'A'.

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