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How do i tell if a substance has been Oxidised or Reduced?

We know from GCSE that Gaining of electrons is reduction; and Loss of electrons is oxidation. This can be remembered by the pneumonic: 'OIL RIG' :Oxidation Is Loss Reduction Is Gain. At A-level it can be con...
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Answered by Dominic K. • Chemistry tutor
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Please explain why graphite is able to conduct electricity

Graphite is an allotrope of carbon. The structure of graphite is a honeycomb structure where each carbon is covalently bonded to 3 other carbons. Given that carbon is able to make 4 bonds, there is one free ...
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Answered by Laura L. • Chemistry tutor
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How does the oxidising power of the group 1 metals vary?

The group one metals all have one electron in their outer shell, so are "electron donors". The further down the group one goes, the higher the electron shell containing the lone electron. The resul...
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Answered by Adithya K. • Chemistry tutor
3693 Views

What is meant by 'activation energy' ?

This is the MINIMUM energy required for a reaction to work or to be activated. If this energy is not reached, the reaction in full does not happy. Imagine a game of basketball. If you do not shoot the ball h...
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Answered by Yacine H. • Chemistry tutor
3634 Views

Define what 1 mole is

1 mole is just a unit of the amount of particles present in a substance. Here are several definition that all interlink: Mathematically speaking, 1 mole = mass of substance / Molecular Formula Mass. For it t...
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Answered by Yacine H. • Chemistry tutor
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