NTA Abhyas NEET2020ChemistryIonic EquilibriumPractice
calculate the equilibrium constant for N H 3 + H 2 O ⇌ N H 4 + + O H - if, for the equilibrium, N H 4 + + H 2 O ⇌ N H 4 O H + H + the equilibrium constant is 5.5 × 10 – 10
Options
- A1.8 × 10 – 4
- B1.8 × 10 – 5
- C1.8 × 10 – 6
- D1.8 × 10 – 7
Correct answer
B. 1.8 × 10 – 5
Step-by-step solution
N H 4 + + H 2 O ⇌ N H 4 O H + H + K eq = NH 4 OH OH − H + H 2 O NH 4 + OH − K e q = K w K b ⇒ 5.5 × 10 - 10 = 10 - 14 K b K b = 10 - 14 5.5 × 10 - 10 = 1.8 × 10 - 5