Berry List of Chemistry Experiments (PEKA) Form 4 (Part 1)

by BerryBerryTeacher

in Berry Experiment (Experiments & PEKA)

This post is the list of PEKA experiments for SPM Chemistry Form 4 from Berry Berry Easy. Please familiarise with all these experiments from Form 4 Chemistry Chapter 2: The Structure of the Atom before conducting them so as to be better prepared. The list of experiments are as below:

Berry List of Chemistry Experiments (PEKA) Form 4 (Part 1)

peka-spm-chemistry-chapter-2

Chapter 2 – The Structure of the Atom

List of PEKA experiments:

  1. Diffusion of particles in a gas, liquid and solid
  2. Rate of diffusion depends on the temperature
  3. Rate of diffusion depends on the mass of the gas particles
  4. Melting and freezing points of naphthalene, C10H8
Number Activity 2.1
Pg. 7
Title Diffusion of particles in a gas, liquid and solid
Aim To investigate the diffusion of particles in a gas, liquid and solid
Problem Statement How diffusion does occur through solid, a liquid and gas?
Hypothesis Particles can diffuse through the spaces between the particles of a solid, a liquid and the gas.
Apparatus A. Diffusion in a gas

  • Gas jars
  • Gas jar covers

B. Diffusion in a liquid

  • Droppers / Teat pipette
  • Thistle funnel
  • Spatula

C. Diffusion in a solid

  • Stoppers
  • Test tubes
  • Test tube rack
  • Retort stand and clamp
Material A. Diffusion in a gas

  • Liquid bromine, Br2

B. Diffusion in a liquid

  • 1 mol dm-3 potassium manganate (VII), KMnO4 solution
  • Water

C. Diffusion in a solid

  • Potassium manganate(VII), KMnO4 crystal / Copper(II) sulphate, CuSO4 crystal
  • Hot liquid gel
Variables
  • Manipulated variable: Type of medium
  • Responding variable: Motion of the particles
  • Controlled / Fixed variable: Temperature and pressure

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Number Activity 2.2
Pg. 8
Title Rate of diffusion depends on the temperature
Aim To show that the rate of diffusion depends on the temperature
Problem Statement How does rate of diffusion depends on the temperature?
Hypothesis Higher temperature can increase the rate of diffusion
Apparatus
  • Beakers
  • Droppers
Material
  • Food colouring
  • Water
  • Ice water
  • Hot water
Variables
  • Manipulated variable: Temperature of water
  • Responding variable: Rate of diffusion
  • Controlled / Fixed variable: Concentration and volume of food colouring and pressure
Operational Definition Higher temperature in water increases the particles to move faster and increases the rate of diffusion. / Higher temperature in water increases the kinetics energy than lower temperature in water.

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Number Activity 2.3
Pg. 9
Title Rate of diffusion depends on the mass of the gas particles
Aim To show that the rate of diffusion depends on the mass of the gas particles
Problem Statement How does rate of diffusion depends on the mass of the gas particles?
Hypothesis Low molecular masses diffuse faster than those with high molecular masses
Apparatus
  • Glass tube
  • Stoppers
  • Retort stand and clamp
  • Beakers
  • Droppers
Material
  • Glass wool
  • Concentrated ammonia, NH3 solution
  • Concentrated hydrochloric acid, HCl
Variables
  • Manipulated variable: Mass of the gas particles
  • Responding variable: Rate of diffusion
  • Controlled / Fixed variable: Temperature and pressure
Operational Definition Gas with low molecular masses diffuse faster than those with high molecular masses.

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Number Activity 2.4
Pg. 9
Title Melting and freezing points of naphthalene, C10H8
Aim To determine the melting and freezing points of naphthalene, C10H8
Problem Statement How does rate of diffusion depends on the mass of the gas particles?
Hypothesis The temperature of naphthalene, C10H8 increase during heating except at its melting and solidification points
Apparatus
  • Boiling tube
  • 250 cm3 beaker
  • Thermometer (0 – 100˚C)
  • Tripod stand
  • Retort stand and clamp
  • Bunsen burner
  • Stopwatch
  • Conical flask
  • Wire gauze
Material
  • Naphthalene, C10H8
  • Water
Variables
  • Manipulated variable: Heat supplied
  • Responding variable: Temperature
  • Controlled / Fixed variable: Naphthalene, C10H8

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