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What is a redox reaction? Oxygenways
Oxidation is the addition of oxygen to a substance and Reduction is the removal of oxygen from a substance.
mnemonic bridge OILRIG
Oxidation
Is
Loss of electrons
Reduction
Is
Gain of electrons
What are half equations used for?
To show the loss or the gain of electrons.
Adding Potassium to an unknown substance with a reducing agent
What happens coulourwise?
Solution changes to purple, than fades because of the reducing agent.
Adding Potassium Iodide to Acidified Hydrogen Peroxide
What happens coulourwise?
Solution turns red- brown
Adding Potassium Iodide to Acidified Hydrogen Peroxide
Why does the colour change?
The Potassium Iodide is oxidised by the oxidasing agent and Iodine is formed.
