Berry List of Chemistry Experiments (PEKA) Form 5 (Part 4)

by BerryBerryTeacher

in Berry Experiment (Experiments & PEKA)

This post is the list of PEKA experiments for SPM Chemistry Form 5 from Berry Berry Easy. Please familiarise with all these experiments from Form 5 Chemistry Chapter 4: Thermochemistry before conducting them so as to be better prepared. The list of experiments are as below:

Berry List of Chemistry Experiments (PEKA) Form 5 (Part 4)

Chapter 4 – Thermochemistry

List of PEKA experiments:

  1. Exothermic and endothermic reactions
  2. Heat of precipitation
  3. Heat of displacement
  4. Heat of neutralisation
  5. Heat of neutralisation of acids and alkalis of different strength
  6. Heat of neutralisation
  7. Heats of combustion for alcohols
Number Laboratory Work 4.1
Pg. 101
Title Exothermic and endothermic reactions
Aim To identify an exothermic or endothermic reaction
Problem Statement How to identify exothermic or endothermic reactions?
Hypothesis Exothermic reaction occurs when the temperature of the reaction mixture increases.Endothermic reaction occurs when the temperature of the reaction mixture decreases.
Apparatus
  • Plastic cup with cover / Polystyrene cup
  • 0 – 110˚C thermometer
  • Spatula
  • Glass rod
  • 50 cm3 measuring cylinder
Material
  • Solid sodium hydrogen carbonate, NaHCO3
  • Solid sodium hydroxide, NaOH
  • Solid ammonium chloride, NH4Cl
  • Solid ammonium nitrate, NH4NO3
  • Solid ammonium sulphate, (NH4)2SO4
  • 2.0 mol dm-3 hydrochloric acid, HCl
  • Distilled water
Variables
  • Manipulated variable: Pairs of reactants
  • Responding variable: The temperature change in the reaction mixture
  • Controlled / Fixed variable: Types of container, volume of solution or water

===============================================

Number Laboratory Work 4.2
Pg. 104
Title Heat of precipitation
Aim To determine the heat of precipitation of silver chloride, AgCl
Apparatus
  • Plastic cup with cover / Polystyrene cup
  • 0 – 110˚C thermometer
  • Glass rod
  • 50 cm3 measuring cylinder
Material
  • 0.5 mol dm-3 silver nitrate solution
  • 0.5 mol dm-3 sodium chloride solution

===============================================

Number Laboratory Work 4.3
Pg. 106
Title Heat of displacement
Aim To determine the heat of displacement of copper
Apparatus
  • Plastic cup with cover / Polystyrene cup
  • 0 – 110˚C thermometer
  • Glass rod
  • 50 cm3 measuring cylinder
Material
  • 0.5 mol dm-3 copper(II) sulphate solution
  • Zinc power

===============================================

Number Laboratory Work 4.4
Pg. 108
Title Heat of neutralisation
Aim To determine the heats of neutralisation between strong acids and strong alkalis
Apparatus
  • Plastic cup with cover / Polystyrene cup
  • 0 – 110˚C thermometer
  • Glass rod
  • 50 cm3 measuring cylinder
Material
  • 2.0 mol dm-3 hydrochloric acid, HCl
  • 2.0 mol dm-3 sodium hydroxide, NaOH solution
  • 2.0 mol dm-3 nitric acid, HNO3
  • 2.0 mol dm-3 potassium hydroxide, KOH solution

===============================================

Number Laboratory Work 4.5
Pg. 109
Title Heat of neutralisation of acids and alkalis of different strength
Aim To determine and compare the heats of neutralisation between acids and alkalis of different strength
Problem Statement How do the heat of neutralisation for reactions between acids and alkalis of different strength?
Hypothesis The values of heat of neutralisation for reactions between strong acids and strong alkalis are higher than that of reactions between strong acids and weak alkalis / weak acids and strong alkalis or weak acids and weak alkalis.
Apparatus
  • Plastic cup with cover / Polystyrene cup
  • 0 – 110˚C thermometer
  • Glass rod
  • 50 cm3 measuring cylinder
Material
  • 2.0 mol dm-3 ethanoic acid, CH3COOH
  • 2.0 mol dm-3 hydrochloric acid, HCl
  • 2.0 mol dm-3 sodium hydroxide, NaOH solution
  • 2.0 mol dm-3 ammonia, NH3 solution
Variables
  • Manipulated variable: Different strength of acids and alkalis
  • Responding variable: The value of heat of neutralisation
  • Controlled / Fixed variable: Volume and concentration of acids used, volume and concentration of alkalis used.

===============================================

Number Laboratory Work 4.6
Pg. 110
Title Heat of neutralisation
Aim To determine and compare the heats of neutralisation between:

  • Hydrochloric acid (strong acid), HCl and sodium hydroxide (strong base), NaOH solution
  • Ethanoic acid (weak acid), CH3COOH and sodium hydroxide (strong base), NaOH solution
  • Hydrochloric acid (strong acid), HCl and ammonia (weak base), NH3 solution
  • Ethanoic acid (weak acid), CH3COOH and ammonia(weak base), NH3 solution
Problem Statement How are the heats of neutralisation determined and compared?
Hypothesis The heat of neutralisation between hydrochloric acid and sodium hydroxide is higher than the heat of neutralisation between ethanoic acid and ammonia solution.
Apparatus
  • 50 cm3 burette
  • 25.0 cm3 pipette
  • Pipette filler
  • Retort stand and clamps
  • Plastic cup / Polystyrene cup
  • 250 cm3 beaker
  • Magnetic stirrer
  • Magnetic stir bar
  • Temperature sensor
  • Computer
  • Computer interface
  • Stopwatch
Material
  • 1.0 mol dm-3 hydrochloric acid, HCl
  • 1.0 mol dm-3 sodium hydroxide, NaOH solution
  • 1.0 mol dm-3 ethanoic acid, CH3COOH
  • 1.0 mol dm-3 ammonia, NH3 solution
Variables
  • Manipulated variable: Different types of acids and bases
  • Responding variable: Heat of neutralisation
  • Controlled / Fixed variable: Volume and concentration of acid and alkali used

===============================================

Number Experiment 4.1
Pg. 112
Title Heats of combustion for alcohols
Aim To determine the heats of combustion for alcohols
Problem Statement Does alcohol with a higher number of carbon atoms per molecule have a higher heat of combustion?
Hypothesis The higher the number of carbon atoms in the alcohol molecules, the higher is the heat of combustion.
Apparatus
  • Copper can
  • Thermometer
  • Glass rod / Stirrer
  • Measuring cylinder
  • Tripod stand
  • Spirit lamp
  • Wooden block
  • Weighing balance
  • Wind shield / Asbestos screen
Material
  • Methanol
  • Ethanol
  • Propanol / Prop-1-ol
  • Butanol / But-1-ol
  • Water
Variables
  • Manipulated variable: Different types of alcohols
  • Responding variable: Heat of combustion of alcohol
  • Controlled / Fixed variable: Volume of water and copper can / metal container (calorimeter)

{ 2 comments… read them below or add one }

October 24, 2011
October 25, 2011

Previous post:

Next post: