The colour of phenolphthalein indicator in dilute HNO<3(aq) is

Assessment: WAEC SSCE - Chemistry - 2008 (Objective) Subject: Chemistry

Question 1 Report

The colour of phenolphthalein indicator in dilute HNO<3(aq) is
Answer Details
In dilute HNO3(aq), phenolphthalein indicator will be colorless. Phenolphthalein is a pH indicator that changes color depending on the pH of the solution it is in. In acidic solutions (pH less than 7), phenolphthalein is colorless. HNO3(aq) is a strong acid, so it will completely dissociate in water to form H+ ions, resulting in a low pH and a colorless phenolphthalein indicator.
Read lesson note on Acids, Bases And Salts (Ghana Only) (WAEC)
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