Question

which indicator has to be used in order to get an emerald green color at a pH of 9?
a) universal indicator
b) methyl orange indicator
c) thymol blue indicator
d) cyanidin

Answer 1

Answer:

D) Cyanidin indicator

Explanation:

Answer 2

Cyanidin indicator has to be used in order to get an emerald green color at a pH of 9.

What is an indicator?

Indicators are substances that change colour when they are added to acidic or alkaline solutions.

In nature, cyanidin is a reddish-purple (magenta) pigment. It is the major pigment in berries [4] and other red-coloured vegetables such as red sweet potato and purple corn. It appears as a blue-reddish or purple pigment in the plant.

Cyanidin indicator has to be used in order to get an emerald green colour at a pH of 9.

Learn more about indicators here:

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