B.0.4—Powers, exponentials and logarithms

Use calculators to find and use power functions, including calculations with the Avogadro constant. Exponential and logarithmic functions, pH and pKa calculations, and buffer approximations are A2-only applications.

Use b.0.4—powers, exponentials and logarithms to connect the rule to the data and decision in the question.

This matters because b.0.4—powers, exponentials and logarithms determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b.0.4—powers, exponentials and logarithms to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: B.0.4—Powers, exponentials and logarithms is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.