Which of the following indicates the most basic solution?A. [H+] = 1 × 10-10 MB. pOH = 6.7C. [OH-] = 7 × 10-5 MD. pH = 4.2

The most basic solution is A

Explanation:

In order to solve the problem, we can compare the pH of the solutions. The most basic solution is the one with the highest pH.

A. [H⁺] = 1 × 10⁻¹⁰ M

pH = - log [H⁺] = - log (1 × 10⁻¹⁰) = 10

B. pOH = 6.7

pH = 14 - pOH = 14 - 6.7 = 7.3

C. [OH⁻] = 7 × 10⁻⁵ M

pOH = - log [OH⁻] = -log (7 × 10⁻⁵) = 4.15

pH = 14 - pOH = 14 - 4.15 = 9.8

D. pH = 4.2

According to this, solution A has the highest pH (pH=10), thus this is the most basic solution.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.