Answer:
Explanation:
pKa = 3.86
-log Ka = pKa
- log Ka = 3.86
Ka = 1 / ( 10^(3.86)) = 1.38 × 10⁻⁴
lactic → (H⁺) + lactate
but Ka ( equilibrium constant ) = ( H⁺) (lactate) / ( lactic acid)
when HCl dissociate, it forms
HCl → H ⁺ + Cl⁻
0.08 M of HCl will yield 0.08 M H⁺, lactate ion = 0.1 M
1.38 × 10⁻⁴ = (0.08) (lactate) / 0.1
(1.38 × 10⁻⁴ × 0.1) / 0.08 = lactate
lactate = 1.73 × 10⁻⁴
