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Grade 12th passInorganic Chemistry

Ionic Equilibrium question answer a second option please explain the procedure

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Profile image of Sanskrit gupta
8 Years agoGrade 12th pass
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Profile image of Vikas TU
7 Years ago

It is given that HX is weak acid and that the Ka for it is 10^-5 .So we will try to find the concentration of X- using the formula Ca.

 

We know a=square root of(K/C)which is 0.01.So upon multiplying with C we get [X-] to be 0.001.

 

We know Kh is equal to [X-][Na] so we get 10^-4 on multiplying as concentration of Na is 0.1.Since we wnat percentage we will multiply our answer with 100 to get 10^-2%.