MEDIUMMCQ SINGLENEET 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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