pH Curves (AQA A-Level Chemistry): Flashcards

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pH Curves
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Strong acid + strong base: equivalence pt pH

Near pH 7

Weak acid + strong base: equivalence pt pH

Above pH 7

Strong acid + weak base: equivalence pt pH

Below pH 7

pH starts below 7: what's being added?

Base to acid

pH starts above 7: what's being added?

Acid to base

Weak acid + strong base: preferred indicator

Phenolphthalein

Strong acid + weak base: suitable indicator

Methyl orange

Strong acid + strong base: indicators

Most indicators

Weak acid + weak base: equivalence pt change

Very gradual

First step to plot pH curve

Use pH meter to record initial pH

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Explore AQA A-Level Chemistry Quizzes by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Exam Questions by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

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