Question

a very basic (alkaline) solution would be expected to have a ph of...

Explanation:

The pH scale ranges from 0 - 14. A pH of 7 is neutral. Values less than 7 are acidic, and values greater than 7 are basic (alkaline). The higher the pH value above 7, the more basic the solution. Among the given options (9, 7, 4, 13, 0), 13 is the highest value above 7.

Answer:

13