Acid-Base Indicators
18. Aqueous Equilibrium / Acid-Base Indicators / Problem 3
An unknown colorless solution turns red when paramethyl red is added. It turns orange when erythrosine is added. Choose another indicator that will give a more precise value for the pH of the solution
a. Metacresol Purple
b. Thymolphthalein
c. Quinaldine Red
d. Ethyl Red
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