The ph scale is used to tell if a
substance is an acid or base.
substances with a ph of 7 are
neutral. an acid is anything below
7 and a base is anything above 7.
if a certain substance has a ph of
11, what type of substance is it?
a. acid
b. base
c. neutral

Base

Explanation:

Because we know that an acid is anything below 7 and a base is anything above 7. So in this situation, a subtance has a pH of 11 means 11 > 7.

Therefore, the substance would be a base.

Hope this help :3

the dark variety, as they are not visible on the dark tree barks

explanation: