Acids_Bases_Salts_5min_Presentation.pptx

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1. Chapter 2: Acids, Bases and Salts 5-Minute Online Teaching Presentation

2. Introduction • Acids, bases, and salts are important in our daily life. • Acids: Sour in taste (e.g., lemon, vinegar). • Bases: Bitter and soapy (e.g., soap, baking soda). • Salts: Formed by reaction of acids and bases.

3. Common Acids & Bases • Common Acids: HCl, H2SO4, HNO3, Acetic acid. • Common Bases: NaOH, KOH, Ca(OH)2. • Organic acids are weak (e.g., citric acid). • Inorganic acids are strong (e.g., HCl).

4. Indicators • Litmus: Red in acid, Blue in base. • Phenolphthalein: Colourless in acid, Pink in base. • Natural indicators: Red cabbage. • Olfactory indicators: Onion, clove oil.

5. Reactions of Acids & Bases • Acid + Metal → Salt + Hydrogen gas. • Acid + Carbonate → Salt + Water + CO2. • Acid + Base → Salt + Water (Neutralisation).

6. Salts & Their Importance • Baking Soda (NaHCO3): Used in cooking. • Washing Soda (Na2CO3): Used in cleaning. • Bleaching Powder (CaOCl2): Used for disinfection.

7. Uses in Daily Life • Acids: Vinegar in food, citric acid in fruits. • Bases: Soap, toothpaste, antacids. • Salts: Preservatives, medicines, fertilizers.

8. Quick Summary • Acids: Sour, react with bases. • Bases: Bitter, neutralise acids. • Salts: Products of acid-base reaction. • Indicators help identify acids and bases. • Daily life uses are very important.

9. Quick Question Q: Why does lemon taste sour? A: Because it contains citric acid.

10. Thank You Any Questions?