Buffer action (A-level only) (3.1.12.6) | AQA A-level Chemistry - (7405) | KnowledgeSet

Buffer action (A-level only)

Chemistry · A-Level · AQA · AQA A-level Chemistry - (7405) · Specification point · 3.1.12.6 · Physical chemistry · Acids and bases (A-level only)

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3.1.12.6 Buffer action (A-level only)

Content	Opportunities for skills development
$A buffer solution maintains an approximately constant pH, despite dilution or addition of small amounts of acid or base. Acidic buffer solutions contain a weak acid and the salt of that weak acid. Basic buffer solutions contain a weak base and the salt of that weak base. Applications of buffer solutions. Students should be able to: explain qualitatively the action of acidic and basic buffers calculate the pH of acidic buffer solutions.$	$AT a, c, e and k PS 1.1 Students could be asked to prepare and test a buffer solution with a specific pH value. MS 0.4 Students make appropriate mathematical approximations in buffer calculations.$

Content

Opportunities for skills development

A buffer solution maintains an approximately constant pH, despite dilution or addition of small amounts of acid or base. Acidic buffer solutions contain a weak acid and the salt of that weak acid. Basic buffer solutions contain a weak base and the salt of that weak base. Applications of buffer solutions. Students should be able to: explain qualitatively the action of acidic and basic buffers calculate the pH of acidic buffer solutions.

AT a, c, e and k PS 1.1 Students could be asked to prepare and test a buffer solution with a specific pH value. MS 0.4 Students make appropriate mathematical approximations in buffer calculations.