Question

1. phenolphthalein will turn a solution pink if the solution contains a base, and will remain colorless otherwise. use this information as well as the graphic below to determine what color the solutions below will be (colorless or pink) if you add in a few drops of phenolphthalein.

phenolphthalein only turns pink for bases
substance lemon juice bleach water soda
acid, base, or neutral?
after you add phenolphthalein, what color will the solution turn—pink or colorless?

Explanation:

Step1: Determine nature of substances

Soda is acidic (pH around 2 - 4), water is neutral (pH = 7), bleach is alkaline (pH around 12 - 13), lemon - juice is acidic (pH around 2 - 3).

Step2: Apply phenolphthalein property

Phenolphthalein is colorless in acidic and neutral solutions, and pink in basic solutions.

Answer:

Substance	Acid, Base, or Neutral?	Color after adding phenolphthalein
Water	Neutral	Colorless
Bleach	Alkaline	Pink
Lemon juice	Acidic	Colorless