An 8.00 M solution of a weak acid, HA, is 0.47% ionized. What is the K, of the weak acid? 2.66 x 10-13 3.76 х 10:2 1.78 x 10-4 None of these 5.62 х 10:11

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An 8.00 M solution of a weak acid, HA, is 0.47% ionized. What is the K, of the weak acid?
2.66 x 10-13
3.76 х 10:2
1.78 x 10-4
None of these
5.62 х 10:11
Transcribed Image Text:An 8.00 M solution of a weak acid, HA, is 0.47% ionized. What is the K, of the weak acid? 2.66 x 10-13 3.76 х 10:2 1.78 x 10-4 None of these 5.62 х 10:11
Expert Solution
Step 1

Concentration of weak acid = 8.00 M 

Degree of dissociation (α ) = 0.47 % 

Or degree of dissociation  = 47/100 

Acid dissociation constant (Ka) = ?

•  According to ostwald dilution law , Acid dissociation constant (Ka) is given by formula : 

Ka = C × α2

Where, 

Ka = Acid dissociation constant.

C = concentration of weak acid.

α (alpha) = degree of dissociation.

 

 

 

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