a)If METHYL RED is added to a solution, and the colour of the solution turns RED, what is the pH of the solution?
b)If ALIZARIN YELLOW is added to a solution, and the colour of the solution turns RED, what is the pH of the solution?
c)If BROMOCRESOL GREEN is added to a solution, and the colour of the solution turns BLUE, what is the pH of the solution?
d)If BROMOTHYMOL BLUE is added to a solution, and the colour of the solution turns GREEN, what is the pH of the solution?
Table of Acid-Base indicators:
Name Colour of HIn pH range Colour of In-
methyl orange red 3.1-4.4 yellow
methyl red red 4.4-6.2 yellow
alizarin yellow yellow 10.0-12.0 violet
bromocresol green yellow 4.0-5.6 blue
bromothymol blue yellow 6.2-7.6 blue