11.2.1.8 understand and be able to account for the trends in electronegativity and boiling point, be able to account for the decreasing oxidising ability down the group | 11.2.1.11 be able to identify halide ions using silver nitrate and ammonia solution |
11.2.1.9 recognise the displacement reactions of the halogens | 11.2.1.12 know how chlorine water is formed and the reactions of chlorine with aqueous sodium hydroxide |
11.2.1.10 understand and be able to account for the trend in reducing abilities of the halide ions | 11.2.1.13 understand the use of chlorine as a water treatment and understand the balance of risks and benefits in this process |