A -K1=6.93e-2 min-1- B; A -K2=13.86e-2 min-1- C. Optical rotations per unit conc: A=60°, B=-72°, C=42°. Initial [A]=2M.

Question

A -K1=6.93e-2 min-1-> B; A -K2=13.86e-2 min-1-> C. Optical rotations per unit conc: A=60°, B=-72°, C=42°. Initial [A]=2M.

Prashant Kotian · Accepted Answer

Correct answer: A,D. K_total = 0.2079 min^-1. At t_inf: [B]=2/3 M, [C]=4/3 M. alpha_inf = (2/3)*(-72) + (4/3)*(42) = -48 + 56 = +8° (dextrorotatory, A correct). t_1/2 = 0.693/0.2079 = 3.33 min (not 15 min). At 75% conversion: [A]=0.5, [B]=0.5, [C]=1.0; α = 0.5*60 + 0.5*(-72) + 1.0*42 = 36° (D correct).

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