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Acids & Bases (Bases (Physical Properties (Texture: Soapy, pH
Strong…
Acids & Bases
Bases
Definition
Base: A substance that reacts with an Acid to produce salt & water only
Alkali: A substance that produces **Hydroxide ions, OH⁻, when dissolved in waterExamples: (Alkalis)
- Sodium Hydroxide, NaOH
- Calcium Hydroxide, Ca(OH)₂
- Potassium Hydroxide, KOH
Examples: (Bases)
- Copper (II) Oxide, CuO
- Magnesium Oxide, MgO
Physical Properties
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pH
- Strong Alkali: 11 - 14
- Weak Alkali: 8 - 10
Uses
- Magnesium Oxide: Milk of Magnesia (Treat Gastric pain)
- Sodium Hydroxide: Soap Making
- Calcium Hydroxide: Neutralising soil
- Ammonia Solution: Fertilisers
Effects on Indicator
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Universal Indicators
- Strong Alkali: Purple
- Weak Alkali: Blue
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Acids
Physical Properties
pH
- Strong Acid: 1 - 2
- Weak Acid: 3 - 6
Uses
- Ethanoic Acid: Viniger
- Phosphoric Acid: Making soft drinks
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Effects on Indicators
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Universal Indicators
- Strong Acid: Red
- Weak Acid: Orange/Yellow
Definition
- An acid is a substance that produces hydrogen ions, H⁺, when dissolved in water
Examples
- Hydrochloric Acid, HCl
- Sulfuric Acid, H₂SO₄
- Nitric Acid, HNO₃
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