Calculations for AS and A level Chemistry
Being confident in tackling different types of mole calculation is the foundation upon which much of A level chemistry stands
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Understanding the relationship between Kc and Kp
We can derive a value for the equilibrium constant in a gaseous equilibrium system either using partial pressures, Kp, or
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Calculating Kp, the equilibrium constant, for a gaseous system.
For reversible reactions taking place in the gaseous phase it is more straightforward to think in terms of pressure rather
Continue readingCalculating Kp, the equilibrium constant, for a gaseous system.
Why don’t reactions at equilibrium go to completion?
To complete our understanding of systems that have achieved equilibrium, we need to look at the position of equilibrium through
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How to find the equilibrium constant and equilibrium concentrations for a reaction
Now it is time to introduce the concept of the equilibrium constant, Kc. Kc is basically a ratio – the
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What is le Chatelier’s Principle?
When we have a chemical reaction that has reached a state of dynamic equilibrium, there will be one particular set
What is position of equilibrium?
I’m sure you will all have seen a strip of magnesium burning in a Bunsen burner flame. It is a
Elimination reactions – dehydrating an alcohol
If we dehydrate an alcohol, we are essentially removing a water molecule and the product will be an alkene. The
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Electrophilic addition in alkenes (3) – reaction with water to form an alcohol
The reaction of an alkene with water to from an alcohol is an example of a hydration reaction. The alkene
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Electrophilic addition in alkenes (2) – the bromine water test
The classic test for an alkene is to shake your sample with orange bromine water, and if the molecule contains
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Making addition polymers by radical polymerisation
The mechanism for addition polymerisation is another example of a radical reaction. Teflon (PTFE), famously known for its non-stick properties,
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