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Grade: 12th pass
        Acid HA has a pKa=20 and HB has a pKa=10.which is stronger acid?will an acid base reaction with an equilibrium to the right take pplace if Na+A- is added to HB? Explain your answer
2 years ago

Answers : (1)

Arun
23032 Points
							
Dear Kajal
 
I know that the lower pKa is a stronger acid, which makes answer HB.
Hence HB is stronger acid.
 
 
What secind part really asks if it this reaction will happen:
 HB + A- = B- + HA 
and to find the answer you have to know which conjugate base - A- or B- is stronger.
 
HB + A- = B- + HA strong acid + A- = B- + weak acid Since HB is a stronger acid, isn't A- a stronger base? stronger acid=weaker conj. base?

Hence answer will be yes.
 
Regards
Arun (askIITians forum expert)
2 years ago
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