red litmus paper remains red when in contact with acidic or neutral solutions.
Explanation:
Red litmus contains a weak diprotic acid. When it is exposed to a basic compound, the hydrogen ions react with the added base. The conjugate base, formed from the litmus acid, has a blue color, so the wet red litmus paper turns blue in alkaline solution.
BRA - blue litmus paper turns red when in contact with acid solutions
Answers & Comments
Answer:
red litmus paper remains red when in contact with acidic or neutral solutions.
Explanation:
Red litmus contains a weak diprotic acid. When it is exposed to a basic compound, the hydrogen ions react with the added base. The conjugate base, formed from the litmus acid, has a blue color, so the wet red litmus paper turns blue in alkaline solution.
BRA - blue litmus paper turns red when in contact with acid solutions