electrochemistry

please solve without using calculator

@NishantThakre
It was coming 2.87 due to inaccurate calculation
I rounded off to 2.85 ( question me diya tha isliye...)

@AshishSingh
ok got it i was doing silly mistake while giving test
i had to calculate 10^(2.85) splitting it as 10^2*10^0.85 didnt strike at that timeWe could have solved it by using E°=0.06/n logkeq also it would have reduced calculation

@NishantThakre yess