BITSAT2022ChemistryIonic EquilibriumActual
What is [ NH ₄⁺ ] in a solution that is 0.02 M NH ₃0.01 M KOH ? [K_b ( NH ₃ )=1.8 10⁻⁵ ]
Options
- A3.6 10⁻⁵ M
- B1.8 10⁻⁵ M
- C0.9 10⁻⁵ M
- D7.2 10⁻⁵ M
Correct answer
A. 3.6 10⁻⁵ M
Step-by-step solution
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