We are given three solutions
Solution A: [OH^-] = 2.43 × 10^–7 M 
Solution B: [H₃O⁺] = 7.79 × 10^–9 M 
Solution C: [OH^-] = 0.000349 M


a. What is the [H₃O⁺] for solution A?
b. What is the [OH^-] for solution B?
c. What is the [H₃O⁺] for solution C?
c. Which of the three solutions is the most basic?

• A. (a) [H₃O⁺] = 2.43x10^-7 M (b) [OH^-] = 7.79x10^-9 M (c) [H₃O⁺] = 0.000349 M (d) Solution B
• B. (a) [H₃O⁺] = 4.12x10^-8 M (b) [OH^-] = 1.28x10^-6 M (c) [H₃O⁺] = 2.87x10^-11 M (d) Solution C
• C. (a) [H₃O⁺] = 4.12x10^-8 M (b) [OH^-] = 7.79x10^-9 M (c) [H₃O⁺] = 2.87x10^-11 M (d) Solution B
• D. (a) [H₃O⁺] = 2.43x10^-7 M (b) [OH^-] = 7.79x10^-9 M (c) [H₃O⁺] = 0.000349 M (d) Solution A

Answer: (B)