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Pakistan Board > ecat > Chemistry (Total Videos: 993)

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Chapter 1: Basic Concepts (78 videos)
1.1: Atom
  1. Atom DEMO
  2. Evidence of Atoms
  3. Molecule
  4. Ion
  5. Molecular ion
  6. Molecular Ion
1.2: Relative Atomic Mass
  1. Relative Atomic Mass in Grams
  2. Calculating the Average Atomic Mass
1.3: Significant Figures
  1. Introduction to Significant Figures DEMO
  2. Rules to Find the Significant Digits in a Measurement
  3. Zero as Significant Figure
  4. Rounding Off the Numbers
  5. Rounding Off the Numbers (continued)
  6. Addition and Subtraction of Significant Figures
  7. Introduction to Scientific Notation
1.4: Use of Exponents
  1. Logarithm Definition DEMO
  2. Characteristic & Mantissa of Logarithm
  3. How to Find Characteristic of Given Number
  4. Finding Mantissa of Number by Log Table
  5. Introduction to Anti-Logarithms
  6. Common Logarithm
  7. Product Law of Logarithm
  8. Power Law of Logarithm
  9. Quotient Law of Logarithm
  10. Applications of Logarithm Laws in Calculations
  11. Errors and Uncertainty in Measurement
1.5: Isotopes
  1. Isotopes DEMO
  2. More on Isotopes
  3. Relative Abundance of Isotopes
  4. Determination of Ar of Isotopes by Mass Spectrometry
  5. More on Determination of Ar of Isotopes
  6. Average Atomic Masses
  7. Calculate Percentage Abundance
1.6: Analysis of a Compound
  1. The Percentage Composition of Elements in a Molecule DEMO
  2. The Percentage Composition of Sodium Carbonate crystal
  3. Empirical formula
  4. Empirical formula-covalent and ionic compound
  5. The Empirical Formula from the Percentage Composition
  6. Empirical Formula from Combustion Analysis
  7. Empirical Formula from Combustion Analysis (continued)
  8. Molecular formula
  9. More on Molecular Formula
  10. Calculating Percentage Composition
  11. Calculating Empirical Formula from Combustion Analysis
  12. Determining Empirical Formula of a Compound
1.7: Concept of Mole
  1. Mole DEMO
  2. More on Concept of Mole
  3. Relative Atomic Mass in Grams
  4. Relative Molecular Mass in Grams
  5. Relative Formula Mass in Grams
  6. Avagadro's Number
  7. More on Avogadro's Number
  8. Determination of Mass of Hydrogen atom
  9. Molar Gas Volume
  10. Calculations of Molar Gas Volume
  11. Mole-Mass Calculations
  12. Representative particles
1.8: Stoichiometry
  1. Stoichiometry DEMO
  2. Stoichiometric Calculations
  3. Calculations Based on Balanced Chemical Equations
  4. The Percentage Composition of Elements in a Molecule
  5. Mole-Mass Calculations
  6. Calculating Moles from Mass
  7. Calculating Mass from Moles
  8. Calculating Mass in Grams and Moles
  9. Mole-Particle Calculations
  10. More on Mole-Particle Calculations
  11. Calculating Mass in Grams of a Single Atom
  12. Calculating Number of Ions in the Compounds
  13. Calculating Number of Particles from Mass
  14. Calculating Mass and Moles of an Element from a Compound
1.9: Limiting Reactant
  1. Limiting Reactants DEMO
  2. Importance of Limiting Reactants
  3. More on Importance of Limiting Reactants
  4. Calculating Limiting and Excess Reactants
1.10: Yield
  1. Percentage Yield
  2. More on Yield
  3. Calculation of Percentage Yield
 

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