Free preview · Senior 3 Chemistry · Laboratory activities
Senior 3 laboratory activities
10 units · 20 activities. In every unit, activity 1 is improvised (simple local materials) and activity 2 is conventional (school laboratory equipment): two different experiments. Below are 5 free pages; then get the whole level in one PDF.
- Title and aim of every experiment
- Required apparatus and safety notes
- A clear, labelled drawing of the set-up
- Step-by-step procedure and a results table to fill in
- Observation and conclusion
- Three questions per activity, with sample results and answers at the end of the unit
See all 20 activities of this level and what each one is about
- Unit 1: Carbon and its Inorganic Compounds
- 1.1 Improvised · Charcoal removes colour: adsorption. To show that charcoal (a form of carbon) adsorbs coloured substances from a solution.
- 1.2 Conventional · Preparing carbon dioxide and testing its properties. To prepare carbon dioxide from marble chips and dilute hydrochloric acid and investigate its properties.
- Unit 2: Nitrogen and its Inorganic Compounds
- 2.1 Improvised · Is there ammonium in this fertiliser?. To show that ammonium fertilisers release ammonia gas when mixed with a base such as wood ash.
- 2.2 Conventional · Preparing ammonia and the fountain experiment. To prepare dry ammonia gas and show that it is very soluble in water and forms an alkaline solution.
- Unit 3: Sulfur and its Inorganic Compounds
- 3.1 Improvised · The black spoon: sulfur in eggs. To show that eggs contain sulfur compounds that react with metals to form dark metal sulfides.
- 3.2 Conventional · Concentrated sulfuric acid as a dehydrating agent (teacher demonstration). To show that concentrated sulfuric acid removes the elements of water from sugar and from hydrated copper(II) sulfate.
- Unit 4: Chlorine and its Inorganic Compounds
- 4.1 Improvised · How household bleach works. To investigate the bleaching action of household bleach (sodium hypochlorite) on dyes.
- 4.2 Conventional · Testing for chloride ions with silver nitrate. To test for chloride and other halide ions in solutions using acidified silver nitrate.
- Unit 5: Rate of Chemical Reactions
- 5.1 Improvised · Fizzing tablets: temperature and surface area. To investigate how temperature and particle size affect the rate of a reaction using effervescent tablets.
- 5.2 Conventional · Following a reaction by loss of mass. To follow the rate of the reaction between marble chips and hydrochloric acid by measuring the loss of mass of carbon dioxide.
- Unit 6: Concentration of Solutions
- 6.1 Improvised · A dilution series with juice or food colouring. To make a series of solutions by dilution and relate colour intensity to concentration.
- 6.2 Conventional · Standard solution and titration. To prepare a standard solution of sodium carbonate and use it to find the concentration of hydrochloric acid by titration.
- Unit 7: Electrolysis and its Applications
- 7.1 Improvised · Electrolysis of salt water with pencil leads. To electrolyse salt water using a 9 V battery and pencil leads and to observe the products at each electrode.
- 7.2 Conventional · Copper plating an iron key. To electroplate an iron object with copper and relate the mass of copper deposited to the charge passed.
- Unit 8: Introduction to Organic Chemistry
- 8.1 Improvised · Finding carbon in foods and materials. To show that organic substances contain carbon by heating them until they char.
- 8.2 Conventional · What is produced when a hydrocarbon burns?. To identify the products of the complete combustion of a hydrocarbon (candle wax).
- Unit 9: Alkanes
- 9.1 Improvised · Properties of kerosene, an alkane mixture. To study some physical and chemical properties of kerosene (paraffin), a mixture of alkanes.
- 9.2 Conventional · Cracking liquid paraffin (teacher demonstration). To crack a long-chain alkane into smaller molecules and test the gaseous product for unsaturation.
- Unit 10: Alkenes and Alkynes
- 10.1 Improvised · Ethene ripens bananas. To show that ethene (an alkene) given off by ripe fruit speeds up the ripening of other fruit.
- 10.2 Conventional · Testing oils and hydrocarbons for unsaturation. To use bromine water to distinguish saturated from unsaturated hydrocarbons and fats.
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