Question

Which of the following is the most basic?

A solution with [OH-] = 1.0×10-10.
A solution with [H+] = 1.0×10-10.
A solution with a pH of 6.
A solution with [OH-] = 1.0×10-6.
A solution with [H+] = 1.0×10-6.

Answer 1

A solution with [H+] = 1.0×10-10

Step-by-step explanation:

Using the equations: pOH = -log([OH-]), pH = -log([H+]), and pH + pOH = 14

To find the most basic solution, find the pH or the pOH.
The pOH of solution 1 is 10, which means the solution is acidic (pH = 4)
The pH of solution 2 is 10, which is quite basic
The pH of solution 3 is 6. slightly acidic
The pOH of solution 4 is 6, and has a pH of 8. Slightly basic
The pH of solution 5 is 6, slightly acidic

Out of all of these, solution 2 and 4 are basic. Solution 2 has a pH of 10, which is more basic than solution 4 with a pH of 8