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NEET 2020 Chemistry: Ionic Equilibrium -04 (10.12.2019)

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Question 1

How much water must be added to 300 ml. of 0 .2 M solution of CH3COOH (Ka = 1 .8 × 10-5) for the D.O.I. (α) of the acid to double?

Question 2

What concentration of HCOO- is present in a solution of 0 .01 M HCOOH (Ka = 1 .8 × 10-4) and 0 .01 M HCl ?

Question 3

If degree of ionization is 0.01 of decimolar solution of weak acid HA then pKa of acid is :

Question 4

What is [NH4+] in a solution that contain 0 .02 M NH3 (Kb = 1 .8 × 10-5) and 0 .01 M KOH ?

Question 5

6.0 g weak acid HA (mol. Wt. = 60 g/mol) is dissolved in water and formed 10 m3 Solution. If Ka(HA) = 10-9, then pOH of solution is : [Given : log 4= 0 .6]
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