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14.5—Hydrogen-ion concentration in mol dm−3 from pH using [H+] = 10^(−pH)

Syllabus
2017
Objective
14.5
Level
A2

—Hydrogen-ion concentration in mol dm−3 from pH using [H+] = 10^(−pH)

Calculate hydrogen-ion concentration in mol dm−3 from pH using [H+] = 10^(−pH).

Use —hydrogen-ion concentration in mol dm−3 from ph using [h+] = 10^(−ph) to connect the rule to the data and decision in the question.

This matters because —hydrogen-ion concentration in mol dm−3 from ph using [h+] = 10^(−ph) determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —hydrogen-ion concentration in mol dm−3 from ph using [h+] = 10^(−ph) to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Hydrogen-ion concentration in mol dm−3 from pH using [H+] = 10^(−pH) is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.

ConceptA-Level Edexcel Chemistry A2