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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: O xidation I s L oss (of electrons) R eduction I s G ain (of electrons) In this example Iodine is going from 2I- to I2 ...
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Answered by Rory B. • Chemistry tutor
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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. Substitution - This involves p...
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Answered by Rory B. • Maths tutor
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Integrate the following function by parts and reduce it to it's simplest form. f(x) = ln(x).

First note that ln(x) = 1 ln(x), this is in the form u dv/dx. Let dv/dx = 1 and u = ln(x). du/dx = 1/x from the standard results and v = x by integration. Substituting into the formula integral(u dv/dx)dx = ...
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Answered by Ryan B. • Maths tutor
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Can you explain the narrative techniques in The Turn of The Screw?

The governess is what we would call an unreliable narrator. She is unreliable for a variety of reasons- the most popular reason amongst critics being that she is insane. Following the psychological analysis ...
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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 characteristics, exp...
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Answered by Lydia S. • Psychology tutor
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