Question

q: a solution with a ph of 2 can be increased to a ph above 7 by adding
a) an acid
b) water
c) a base
d) hydrogen
clear all

Explanation:

A solution with a pH of 2 is acidic (pH < 7). To increase the pH above 7 (make it basic), a base should be added. Adding hydrogen would not change the pH to above 7, adding water would only dilute the acid and move pH closer to 7 but not above it, and adding an acid would lower the pH further.

Answer:

a base