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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-AC-PH-0011 markL1 FoundationCalculatorStrong acids and bases

Calculate the pH of 0.0100 mol dm⁻³ HCl.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0022 marksL2 StandardCalculatorStrong acids and bases

Calculate the pH of 0.0500 mol dm⁻³ NaOH at 298 K (

K_w=1.00\times10^{-14}

).

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0051 markL2 StandardCalculatorBuffers and curves

A buffer could be made from

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0061 markL2 StandardCalculatorBuffers and curves

For titrating ethanoic acid with NaOH, the best indicator is

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0071 markL2 StandardCalculatorBuffers and curves

At half-neutralisation of a weak acid by a strong base,

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0081 markL2 StandardCalculatorWeak acids

A weak acid has

K_a=1.00\times10^{-4}

. Calculate its p

K_a

.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0101 markL2 StandardCalculatorStrong acids and bases

When the temperature of pure water increases, its pH

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0122 marksL2 StandardCalculatorStrong acids and bases

Calculate the pH of 0.0050 mol dm⁻³ H₂SO₄, assuming full dissociation of both protons.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0032 marksL3 ExamCalculatorWeak acids

Calculate the pH of 0.100 mol dm⁻³ ethanoic acid,

K_a=1.74\times10^{-5}

mol dm⁻³.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0042 marksL3 ExamCalculatorBuffers and curves

Calculate the pH of a buffer containing 0.200 mol dm⁻³ CH₃COONa and 0.100 mol dm⁻³ CH₃COOH (

\mathrm{p}K_a=4.76

).

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0092 marksL3 ExamCalculatorWeak acids

A 0.0500 mol dm⁻³ solution of a weak acid has pH 3.00. Calculate

K_a

(×10⁻⁵ mol dm⁻³).

Salam Academy Original Practice · Proposed mark scheme

SA-AC-PH-0111 markL3 ExamCalculatorBuffers and curves

When a little NaOH is added to an ethanoic acid / ethanoate buffer,

Salam Academy Original Practice · Proposed mark scheme