Question
What is [ NH _4^ + ]in a solution that is 0.02 M NH _3 0.01 M KOH ? [K_b ( NH _3 )=1.8 10^ -5 ]
What is [ NH _4^ + ]in a solution that is 0.02 M NH _3 0.01 M KOH ? [K_b ( NH _3 )=1.8 10^ -5 ]
A. 3.6 10^ -5 M
NH _4 OH NH _4^ + + OH ^ - K_b= [ NH _4^ + ] [ OH ^ - ] [ NH _4 OH ] 1.8 10^ -5 = [ NH _4^ + ][0.01] [0.02] [ NH _4^ + ]=3.6 10^ -5 M
Related: Chemistry — Ionic Equilibrium · All PYQ Banks