SPM Chemistry (KSSM) Paper 1

05 Chemical Bonds
5.1 Formation of Compounds
1 Lesson
5.1.1 Formation of Compounds
5.2 Ionic Bonds
2 Lessons
5.2.1 Formation of Ion
5.2.2 Ionic Bonding
5.3 Covalent Bonds
1 Lesson
5.3.1 Covalent Bonding
5.4 Hydrogen Bonds
5.5 Dative Bonds
5.6 Metallic Bonds
5.7 Ionic and Covalent Compounds
1 Lesson
5.7.1 Properties of Ionic and Covalent Compounds
5.8 Chemical Bonds - Practices (Coming Soon)
06 Acids, Bases and Salts
6.1 The Role of Water in Acidic and Basic Properties
3 Lessons
6.1.1 Acids
6.1.2 Bases and Alkali
6.1.3 The Role of Water in Acidic and Basic Properties
6.2 Meaning of pH and Determination of pH
1 Lesson
6.2.1 Meaning of pH and Determination of pH
6.3 Strength of Acids and Alkalis
1 Lesson
6.3.1 Strength of Acids and Alkalis
6.4 Chemical Properties of Acids and Alkalis
3 Lessons
6.4.1 Chemical Properties of Acids
6.4.2 Chemical Properties of Alkalis
6.4.3 Writing Ionic Equation of The Reaction of Acids and Alkalies
6.5 Concentration of Aqueous Solution
2 Lessons
6.5.1 Concentration of Aqueous Solution
6.5.2 Molarity and Number of Moles
6.6 Standard Solution
2 Lessons
6.6.1 Standard Solution
6.6.2 Dilution
6.7 Neutralisation
2 Lessons
6.7.1 Neutralisation
6.7.2 Acid-Base Titration
6.8 Salts, Crystals and Their Uses in Daily Life
1 Lesson
6.8.1 Introduction to Salts
6.9 Preparation of Salts
4 Lessons
6.9.1 Solubility of Salts, Oxide and Hydroxide
6.9.2 Preparing Salts
6.9.3 Preparing Soluble Salts
6.9.4 Preparing Insoluble Salts
6.10 Action of Heat on Salts
2 Lessons
6.10.1 Identifying Gases
6.10.2 Effect of Heat on Salts
6.11 Qualitative Analysis
3 Lessons
6.11.1 Colour of Salts
6.11.2 Identifying Anions
6.11.3 Identifying Cations
6.12 Acids, Bases and Salts - Practices (Coming Soon)
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6.9.2 Preparing Salts

SPM Chemistry (KSSM) Paper 1 6.9 Preparation of Salts 6.9.2 Preparing Salts
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Preparing Salts

Preparation of Soluble Salts

  1. There are 2 things to be considered when preparing a salt:
    1. What are the chemical used?
    2. How to separate the salt from other substance?
  2. Method used to prepare salt depends on the solubility of the salt.
  3. Soluble salts are prepared from the reactions between an acid with a metal/ base/ metal carbonate.
  4. Diagram below shows the chemical reaction that can be used to prepare the soluble salts.
 

Example:
Write chemical equation(s) for the reaction that can be used to prepare the following salts.

  1. Sodium Chloride
  2. Ammonium Nitrate
  3. Potassium sulphate
  4. Zinc Sulphate (3 equations)
  5. Lead(II) nitrate(3 equations)
  6. Copper sulphate(2 equations)

Answer:
a. Sodium Chloride

NaOH + HCl → NaCl + H2O

b. Ammonium Nitrate

NH3 + HNO3 → NH4NO3

c. Potassium sulphate

KOH + H2SO4 → K2SO4 + H2O

d. Zinc Sulphate (3 equations)

ZnO +  H2SO4 → ZnSO4 + H2O
Zn  + H2SO4 → ZnSO4 + H2
ZnCO3  + H2SO4 → ZnSO4 + H2O + CO2

e. Lead(II) nitrate(3 equations)

PbO +  2HNO3 → Pb(NO3)2 + H2O
Pb  + 2HNO3 → Pb(NO3)2 + H2
PbCO3  + 2HNO3 → Pb(NO3)2 + H2O + CO2

f. Copper sulphate(2 equations)

CuO +  H2SO4 → CuSO4 + H2O
CuCO3  + H2SO4 → CuSO4 + H2O + CO2
 
 
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