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Le Chatelier's principle states that if a system is disturbed - something changes - the system will tend to move in the direction that minimises the change.  3 marks from: The forw...

Potassium (K) is in group 1 of the periodic table, therefore it has 1 electron in it's outer shell. Sulfur is in group 6 so it has 6 electrons in it's outer shell. Ionic bonds occur when electrons are tra...

For a reaction to occur molecules must collide with energy greater than or equal to the activation energy, in the correct orientation. The factors affecting the rate of a reaction are:
Pressure of re...

1 mark : Indication that the solution and bromine water should be mixed together1 mark : Indicating that the bromine water will de-colourise / go colourless if the solution contains an alkeneOR 1 mark awa...

Part a) 1 mark : Show the nucleophilic attack of CN- at the carbonyl forming the O-1 mark : Show the protonation of the O- via the deprotonation of HCNPart b)1 mark: Student has identified that the interm...