MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryIonic equilibriumBuffer Solutions

A certain buffer solution contains equal concentration of  Xand HX. The Kb for  X is 10–10. The pH of the buffer is

A.4✓ Correct
B.7
C.10
D.14
Explanation

If b K  for  Xis 10 10 then a K  for HX (Its conjugate acid) is 4 10. Thus, a X pH = pK log HX X pH = 4 log HX >> X HX Thus, pH = 4

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