MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryIonic equilibriumPrevious Year Questions
At 100C the Kw of water is 55 times its value at 25C. What will be the pH of neutral solution? (log 55 = 1.74) (NEET 2013)
A.7.00
B.7.87
C.5.13✓ Correct
D.6.13
Explanation
We know that, at 25C, Kw = 1x1014 At 100C, Kw = 55 x 1016 - w K H OH IONIC EQUILIBRIUM 57 2 14 14 14 H H 55 10 pH log H pH log 55 10 1 1 log 55 10 log55 14log10 2 2 1 1 1.74 14 12.26 6.13 2 2 w K >> x x x 33. Which of the following salts will give highest pH in water? (AIPMT 2014) (a) KCl (b) NaCl (c) 2 3 Na CO (d) 4 CuSO The reaction with water of given compounds is as follows: 2 3 2 2 3 2 2 4 2 2 4 2 Na CO + H NaOH +H CO NaCl+H O NaOH +HCl KCl+H O KO
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