🌟 Chemistry Notes: Acids, Bases, and Salts (Easy Revision)
🔷 What are Acids?
✅ Acids are substances that taste sour and turn blue litmus red.
✔️ Examples:
-
Hydrochloric acid (HCl) → in stomach
-
Sulphuric acid (H₂SO₄) → in car batteries
-
Citric acid → in lemons
🔷 What are Bases?
✅ Bases are substances that taste bitter, feel soapy, and turn red litmus blue.
✔️ Examples:
-
Sodium hydroxide (NaOH) → in soap
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Ammonium hydroxide (NH₄OH) → in window cleaners
-
Calcium hydroxide (Ca(OH)₂) → lime water
🔷 What are Salts?
✅ When an acid reacts with a base, it forms salt and water. This is called neutralisation.
✔️ Example:
HCl + NaOH → NaCl (table salt) + H₂O
🔷 Important Properties
Acids | Bases | |
---|---|---|
Litmus Test | Blue to Red | Red to Blue |
Taste | Sour | Bitter |
Feel | – | Soapy |
pH | Less than 7 | More than 7 |
🔷 Common Uses
✅ Acids:
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Citric acid → used in food and drinks
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Hydrochloric acid → cleaning metal surfaces
✅ Bases:
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Sodium hydroxide → soap making
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Ammonia → household cleaning
✅ Salts:
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Sodium chloride → table salt
-
Baking soda (Sodium bicarbonate) → cooking
🔷 Easy Tip
📌 Acids: Sour + Turns blue litmus red
📌 Bases: Bitter & Soapy + Turns red litmus blue
📌 Salts: Made by Acid + Base reaction
✅ Final Words
Revise these basic concepts, examples, and reactions for MCQs, short answers, and definitions. Practice litmus test questions as they often come in exams.
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#ChemistryNotes #AcidsBasesSalts #EasyChemistry #ExamPreparation #ScienceStudy
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