Top Tips for Success (3)

Read the question - it may seem like an obvious thing to say but make sure you do this. Think! What is the question asking me. A question that English speakers (if you are taking your exam in English) seem to get wrong is along the lines of: Cl2 + 2Br- --> 2Cl- + Br2 What is the oxidising agent? English speakers see the word 'oxidising' and immediately think oxidation. The substance being oxidised is Br- and they write this as their answer - but ...

Reactions of the Haloalkanes and Testing for Halide Ions

This is a good, straight forward lab that can be used to show the relative strengths of the C-Cl, C-Br and C-I bonds, the tests for the halide ions and the relative stability's of the primary, secondary and tertiary carbocations. You will need some ethanol, 1-bromobutane, 1-chlorobutane and 1-iodobutane, 2-bromobutane and 2-bromo-2-methylpropane. To three separate test tubes add 2cm3 of ethanol. Place this in a beaker of hot water (60 oC, from a kettle) and allow the ethanol to reach the same ...