Solution A: [OH^–]= 2.67 × 10^{– 7} M                    Solution A: [H₃O⁺] = 3.75 × 10^-8 M Solution B: [H₃O⁺] = 9.91 × 10^-9                     Solution B: [OH^–] =                     M

Solution C: [H₃O⁺] = 0.000731 M                   Solution C: [OH^–] =                     M

Which of these solutions are basic at 25 °C?

Solution A: [OH^–] =2.67 × 10^-7 M

Solution B: [H₃O⁺] =9.91 × 10^-9 M

Salotion C: [H₃O⁺] = -0.000731 M