NEET2004ChemistryIonic EquilibriumActual
What is the pH of 0.01 M glycine solution? For glycine, K_ a₁ =4.5 10⁻³ and K_ a₂ =1.7 10⁻¹⁰ at 298 ~K ?
Options
- A3.0
- B10.0
- C6.1
- D7.2
Correct answer
C. 6.1
Step-by-step solution
aligned & K=K a₁ K a₂=4.5 10⁻³ 1.7 10⁻¹⁰ & =7.65 10⁻¹³ & [ H ⁺ ]= K C = 7.65 10⁻¹³ 0.01 & = 7.65 10⁻¹⁵ =0.87 10⁻⁷ & pH =- 0.87 10⁻⁷=7-0.93=6.07 & aligned