JEE Main 2007Annual, Paper 1ChemistryEasyEquilibrium123× since 2002The pK_a of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is :AOption A. 7.0BOption B. 4.5COption C. 2.5DOption D. 9.5CheckSkip · show solution
