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Mainly AQA Specification

A01 is a crucial part of the marking scheme so it is important that you come to grips with it effectively. It looks at your ability to critically use textual referen...

C6H6 + CH3C(O)Cl = C6H5C(O)CH3 + HCl

This is an example of an electrophilic aromatic substitution reaction, with the product being a ketone. The AlCl3 serves as a catalyst, converting the acyl chlo...

Investigating sources in conjunction with each other requires the employment of many of the skills used in analysing a single source, be that primary or secondary, but with a few key differences. 'Cross-r...

In order to better understand concurrent validity, we should approach construct validity first: Construct validity refers to a test's ability to measure what it claims to measure. For example, does a test...

We should begin by multiplying out the brackets. Firstly, multiply each term in the first bracket with the first term in the second bracket: x times x equals x² and -2 multiplied by x is equal ...