Question
Download Solution PDFWhich substance is commonly used as an acid-base indicator, which turns red in acidic solutions and blue in basic solutions?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Litmus paper.
Key Points
- Litmus paper is a common acid-base indicator used in laboratories.
- It turns red in acidic solutions (pH less than 7).
- It turns blue in basic solutions (pH greater than 7).
- Litmus paper is derived from lichens, which are symbiotic associations between fungi and algae.
Additional Information
- Acid-Base Indicators
- Substances that change color based on the pH level of the solution they are in.
- Common indicators include methyl orange, phenolphthalein, and bromothymol blue.
- Each indicator has a specific pH range over which it changes color.
- pH Scale
- A scale ranging from 0 to 14 used to measure how acidic or basic a solution is.
- A pH of 7 is neutral, below 7 is acidic, and above 7 is basic.
- Lichens
- Organisms formed from a symbiotic relationship between fungi and algae.
- They are capable of surviving in harsh environments and are used to produce litmus.
- Uses of Litmus Paper
- Commonly used in educational laboratories to teach about acids and bases.
- Used for testing the acidity or alkalinity of various substances in industrial applications.
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