What [NH_4^(+) ] in a solution that contains 0.02M NH_3(K_b =1.8 xx 10^(-5) ) and 0.01 M KOH ?

What [NH_4^(+) ] in a solution that contains 0.02M NH_3(K_b =1.8 xx 10

1.	What [NH_4^(+) ] in a solution that contains 0.02M NH_3(K_b =1.8 xx 10^(-5) ) and 0.01 M KOH ?
Answer» `9 xx 10^(-6)` ` 1. 8 xx 10^(-5)` ` 3.6 xx 10^(-5)` NONE of these Solution :`K_b =([NH_4^(+) ][OH^(-)])/( [NH_4OH]), 1.8 xx 10 ^(-5)=([NH_4^(+)][10^(-2)])/( 2XX10 ^(-2))` ` [NH_4^(+)] =3.6 xx 10 ^(_5) `