All Resource articles – Page 48

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Thermodynamic quantities in a reaction

Calculate the thermodynamic quantities for a reaction using the standard enthalpy of neutralisation (strong acid and strong base) and any other information.
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The thickness of titanium atoms in paint

Discover the thickness of a film of paint, estimating how thick it is by titanium atoms/ions.
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On the acid trail: discovering a 'weak' acid

Using titration and plot pH against volume to discover more about a weak, monoprotic acid.
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Making copper

Learners develop their own scientific methods to make copper metal starting from copper(II) nitrate crystals.
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The best catalyst to decompose hydrogen peroxide

Develop learner’s ideas of catalysis with this open-ended problem using hydrogen peroxide.
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Jets of liquids: the effect of charged plastic on water

Polar covalent bonds, and their affects on water are explored in this open-ended problem.
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Helping an industrial chemist

Devise a method for making a copper catalyst dispersed on an aluminium oxide support.
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Identifying three unknown white solids

Devise experiments to label three white solids correctly by using chemicals and apparatus in the laboratory.
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Amino acids and hair growth

Discover how quickly human hair grows, and develop learner’s understanding of amino acids too.
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What compound? Identify and analyse

Learners can devise their own testing system to identify the nature of a mystery compound.
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Driving force: what makes reactions go

Carry out certain experiments in a given order
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H⁺ ions in water

Allow learners the chance to develop their own testing methods to identify H⁺ ions in samples of water.
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Finding the right ionic compound

Devise a procedure to identify four solids and then use this to carry out the identification.
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Identifying four unknown solutions

Allow learner’s the opportunity to devise their own testing protocols to identify chloride ions in four solutions.
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Find the pattern - alcohols

Consider data on the densities of six primary alcohols and solve four problems based on those data.
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Find the pattern - metals

Consider data on the specific heat capacities for some metals and solve three problems related to those data.
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Find the chloride

Devise experiments to determine which of five solids is the chloride by using chemicals and apparatus in the laboratory.
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Which detergent is best?

Explain two observations related to the production of a jelly-like solid when two detergents were used in combination.
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Cobalt complexes

Devise structures for cobalt complexes given, decide how to distinguish between the four complexes, and identify some properties that are the same for all four complexes.
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Catalase enzyme reactions

Using four distinct questions, with open-ended methods, to explore catalysts and enzymes.