TS EAMCET 04 May 2019 Shift 2 Solved Paper

For a half cell containing a Pt rod immersed in a solution of 1M HA, O2 (g) is bubbled at 1 atm. The standard reduction potential for water formation is 1.23 V. Given a dissociation constant, Ka = 1 × 10−4 for HA. what is Ehalf‌cell at 298 K in V?