REDOX REACTIONS.

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  • Created by: _romaisa
  • Created on: 13-03-18 08:59
What is a redox reaction?
The reaction in which both, oxidation and reduction occur at the same time.
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What is oxidation?
The gain in oxygen, increase in oxidation state, the loss of electrons or gain of hydrogen.
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What is reduction?
The loss of oxygen, decrease in oxidation state, the gain in electrons or gain in hydrogen.
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What's a reducing agent?(reductant)
That helps reduction take place. It is oxidised itself. It loses or donates electrons and this causes reduction to take pleace in the other ion/atom as it gains them.
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What's an oxidising agent?(oxidant)
That helps oxidation take place. It is reduced itself. It takes/accepts electrons from the other ion and hence causes the other atom/ion to be oxidised.
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Name 2 oxidising agents and their color changes.
Acidified Potassium Dichromate VI (K2Cr2O7) : orange to green and Acidified Potassium Permanganate VII (KMnO4): pink to colourless.
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Name 1 reducing agent and its colour change.
Aqueous Potassium Iodide(KI): colourless to brown
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Test for presence of oxidising agent.
Add aquesous potassium iodide which turns from colourless to brown, if an oxidising agent is present.
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Test for presence of reducing agent.
Add acidified potassium dichromate VI which turns from orange to green, if a reducing agent is present.
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What is rusting.
Rusting of iron and steel is an example of a redox reaction. It needs oxygen (or air) and water.
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Combustion is an example of ________?
Oxidation, as it involves a gain in oxygen.
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Other cards in this set

Card 2

Front

What is oxidation?

Back

The gain in oxygen, increase in oxidation state, the loss of electrons or gain of hydrogen.

Card 3

Front

What is reduction?

Back

Preview of the front of card 3

Card 4

Front

What's a reducing agent?(reductant)

Back

Preview of the front of card 4

Card 5

Front

What's an oxidising agent?(oxidant)

Back

Preview of the front of card 5
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