- 1 Acid Bases and Salts
- 1.1 Introduction
- 1.2 Properties of Acids
- 1.3 Properties of Bases
- 1.4 Types of Indicators and its Properties
- 1.5 The reaction of Acids & Bases with Metals
- 1.5.1 The reaction of Base with Metal
- 1.5.2 The reaction of Acids with Metal Carbonates and Metal Hydrogencarbonates
- 1.5.3 The reaction of Acids and Bases with each other
- 1.5.4 The reaction of Non-Metallic Oxides with Base
- 1.5.5 Importance of pH in everyday life
- 1.5.6 Chemical from Common Salt
- 1.5.7 Water of crystallisation
- 1.5.8 Share this:
Acid Bases and Salts
This type of acid is obtained from natural sources e.g Ascorbic acid (Amla and Guava), Lactic acid (Milk), Citric acid (Lemon and Orange) etc.
Types of Indicators and its Properties
The reaction of Acids & Bases with Metals
- Acids react with the metal to form metal salt and release Hydrogen Gas.
Acid + Metal → Hydrogen Gas
- Example: Zinc granules react with dilute Hydrochloric Acid in a test tube.
2HCl + Zn = ZnCl2 + H2
The reaction of Base with Metal
- Bases react with the metal to evolve hydrogen gas. Also, note that all metal does not react with bases. The metal must be more reactive than the metals present in the base for the reaction to take place.
Base + Metal → Salt + Hydrogen Gas
- Example: Zinc granules react with NaOH solution to form Sodium Zincate & evolve Hydrogen Gas.
2NaOH + Zn = Na2ZnO2 + H2
- Hydrogen Gas released can be tested by bringing a burning candle near gas bubbles, it burst with a pop sound.
The reaction of Acids with Metal Carbonates and Metal Hydrogencarbonates
- Acids react with Metal Carbonates And Metal Hydrogencarbonates to form Salt, carbon dioxide and Water. Metal Carbonate/Metal Hydrogen Carbonate + Acid → Salt + Carbon dioxide + Water.
- Examples: (i) 2HCl + Na2CO3 = 2NaCl + CO2 + H2O
(ii) HCl + NaHCO3 = NaCl + CO2 + H2O
- CO2 can be tested by passing it through lime water. It turns Lime Water Milky.
Ca(OH)2 + CO2 = CaCO3 + H2O
- When excess CO2 is passed, milkiness disappears.
- Bases do not react with Metal Carbonates and Metal hydrogencarbonates. Base + Metal Hydrogen Carbonate → No Reaction.
The reaction of Acids and Bases with each other
- Acids and bases react to form salt and water. Acid + Bases → Salt + CO2
- Neutralisation Reaction: Reaction of acid with a base is called a neutralization reaction. Example: HCl + NaOH → NaCl + H2O
- Strong Acid + Weak Base → Acidic salt + H2O
- Weak Acid + Strong Base → Base salt + H2O
- Strong Acid + Strong Base → Neutral salt + H2O
- Weak Acid + Weak Base → Neutral salt + H2O
The reaction of Metallic Oxides with Acid
The reaction of Non-Metallic Oxides with Base
Importance of pH in everyday life
Chemical from Common Salt
Water of crystallisation
SCIENCE Revision Notes
Chapter:01 Chemical Reaction & Equation
Chapter:02 Acid-Base & Salt
Chapter:03 Metals & Non Metals
Chapter:04 Carbon & its Components
Chapter:05 Periodic Classification of Elements
Chapter:06 Life Processes
Chapter:07 Control & Coordinates
Chapter:08 How do Organisms Reproduce
Chapter:09 Heredity & Evolution
Chapter:10 Light Reflection Refraction
Chapter:11 The Human Eye & the Colourful World
Chapter:13 Magnetic Effect of Electric Current
Chapter:14 Source Of Energy
Chapter:15 Our Environment
Chapter:16 Management of Natural Resource