At 50°C the value of K_w is 5.5 × 10^-14.A basic solution at 50°C has A)[H₃O⁺]

Question

At 50°C the value of K_w is 5.5 × 10^-14.A basic solution at 50°C has A)[H₃O⁺] < [OH^-] < 2 × 10^-7 M. B)[H₃O⁺] < 2 × 10^-7 M < [OH^-]. C)[H₃O⁺] = [OH^-] < 2 × 10^-7 M. D)[H₃O⁺] > 2 × 10^-7 M < [OH^-].

Quizplus · Accepted Answer

At basic pH values, [OH-] >> [H+], therefore [OH^-] is much greater than [H₃O⁺]. The given value of K_w at 50°C is 5.5 × 10^-14, which corresponds to a pH of around 10.7. At this pH, the concentration of [H₃O⁺] must be less than 2 × 10^-7 M to maintain basicity. Therefore, the correct option is B.

At 50°C the Value of Kw Is 5

At 50°C the Value of K_w Is 5