IONIC EQUILIBRIUM

pK_b of NH₃ is 4.74. The pH when 100ml of 0.01 M NH₃ solution is 50% neutralised by 0.01 M HCL is
plzz explain

2 Answers

1133

Sourish Ghosh ·2013-06-12 09:23:27

See, 50% neutralization means that conc. of NH4OH and NH4Cl is the same. Therefore,

pOH = pKb + log[salt][base]
=> pOH = pKb
pH = 14 - pOH

1133

Sourish Ghosh ·2013-06-12 07:46:51

Is it 9.26?

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω