14.3—Define the term ‘pH’

Be able to define the term ‘pH’.

Use —define the term ‘ph’ to connect the rule to the data and decision in the question.

This matters because —define the term ‘ph’ determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —define the term ‘ph’ to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Define the term ‘pH’ is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.