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GCSE

Explain which species is oxidised in this reaction: Br2 +2I– 2Br– +I2.

A useful way to answer oxidation/reduction questions is to remeber the acronym OIL RIG:

Oxidation Is Loss (of electrons) 

...

RB
Answered by Rory B. Chemistry tutor
9863 Views

How do I solve simultaneous equations?

Simeltanous equations are a pair of equations that have 2 unknows. In order to solve a simelatneous equation 1 of the unknows must be eliminated. This can be done by either: 

1. Substitut...

RB
Answered by Rory B. Maths tutor
5035 Views

What is an Extraneous Variable?

An Extraneous Variable is something that the experimenter cannot control, which can have an effect on the overall outcome of the experiment. The main four extraneous variables are demand charac...

LS
Answered by Lydia S. Psychology tutor
35969 Views

How does Candy's dog and his fate foreshadow other events?

Candy's dog was once very helpful on the farm, but due to his old age he now has nothing to offer the branch. This is similar to Candy himself, who recognises he is increasingly becoming less useful an...

LS
16366 Views

How can I effectively analyse an unseen poem in exam conditions?

Under high-stress conditions, such as an exam, the most important thing is not to rush in and panic. Read the poem all the way through once or twice without making any annotations. Once you feel that you ...

CS
54093 Views

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