8.26—Understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions

Understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions with Group 1 and 2 metals ii the disproportionation reaction of chlorine with water and the use of chlorine in water treatment iii the disproportionation reaction of chlorine with cold, dilute aqueous sodium hydroxide to form bleach iv the disproportionation reaction of chlorine with hot alkali v reactions analogous to those specified above.

Use —understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions to connect the rule to the data and decision in the question.

This matters because —understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Understand, in terms of changes in oxidation number, the following reactions of the halogens: i oxidation reactions is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.