AP EAMCET2013ChemistrySolutions
The degree of ionization of 0.10 M lactic acid is 4.0 % The value of K_c is
Options
- A1.66 10⁻⁵
- B1.66 10⁻⁴
- C1.66 10⁻³
- D1.66 10⁻²
Correct answer
B. 1.66 10⁻⁴
Step-by-step solution
% dissociation =4 % degree of dissociation ( )= 4 100 =0.04 For lactic acid CH ₃ CH ( OH ) COOH CH ₃ CH ( OH ) COO ⁻+ H ⁺ Initial concentration array cll C mol L & 0 & 0 At. equilibrium C(1- ) & C & C array aligned K_c & = C C C(1- ) = C ^2 (1- ) & = 0.1 0.04 0.04 (1-0.04) & = 1.6 10⁻⁴ 0.96 =1.66 10⁻⁴ aligned