Question

what type of liquid when added to the indicator causes it to turn pink?
A)an acid
B)a base
C)a salt
D)none of the above

Answer 1

Answer:

a base

Phenolphthalein is an indicator of acids (colorless) and bases (pink). Sodium hydroxide is a base, and it was in the pitcher at the beginning, so when added to the phenolphthalein in beakers 2 and 4, it turned pink (top half of the graphic)