Indicator is used to determine wether a substance is an acid or an alkali.
- Red - Yellow = Acid
- Green = Neutral
- Blue - Purple = Alkali
- An Acid is a substance with a pH of less than 7.
- Acids form H+ ions in water
- A base is a substance with a pH of greater than 7.
- An alkali is a base that dissolves in water.
- Alkali's form OH- ions in water.
H+ ions make water acidic and OH- ions make them alkaline.
The reaction between acids and bases is…