100 ml of 0.1 M HCl and 100 ml of 0.1 M HOCN are mixed . What is the concentrationof .. OCN ^(-)..,and pH of the solution ?(K_a=1.2 xx 10^(-6) )

100 ml of 0.1 M HCl and 100 ml of 0.1 M HOCN are mixed . What is the c

1.	100 ml of 0.1 M HCl and 100 ml of 0.1 M HOCN are mixed . What is the concentrationof .. OCN ^(-)..,and pH of the solution ?(K_a=1.2 xx 10^(-6) )
Answer» ` 1.2 xx 10^(-6), 1.3 ` ` 1.2 xx 10^(-6),1` ` 2.6 xx 10^(-8),1.6` ` 2.4 xx 10^(-6), 2.6` SOLUTION :`[H^(+)]= (100 xx 0.1 )/(200)=0.05,pH =2- log 5 =13` `[HOCN]=( 100xx 0.1 )/( 200) = 0.05` ` K_a =([H^(+) ][OCN^(-) ])/( [HOCN])=(1.2 xx 10 ^(-6) xx 0.05 )/( 0.05 ) ` ` = [OCN^(-) ]=1.2 xx 10^(-6) `