Science
- Created by: Aaron Dhadda
- Created on: 21-03-19 18:56
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- Science
- Chemistry
- Physical Chemistry
- The pH Scale
- The strongest acid has pH 0.
- The strongest alkali has pH 14.
- A neutral substance has pH 7.
- Indicators
- An indicator is just a dye that changes colour
- The dye in the indicator changes colour depending on whether it's above or below a certain pH.
- Indicators are very useful for estimating the pH of a solution.
- Examples
- Universal Indicator
- Universal Indicator is a very useful combination of dyes which gives the colours of the pH scale
- Litmus Paper
- Litmus paper tests whether a solution is acidic or alkaline because it changes colour at around pH 7.
- It's red in acidic solutions, purple in neutral solutions and blue in alkaline solutions.
- Phenolphthalein
- Methyl Orange
- Universal Indicator
- The pH Scale
- Physical Chemistry
- Biology
- Physics
- Chemistry
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