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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-KP-0021 markL1 FoundationCalculatorKp
A gas mixture has 2.0 mol N₂, 6.0 mol H₂ and 2.0 mol NH₃. Calculate the mole fraction of H₂.

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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0012 marksL2 StandardCalculatorKp
A mixture contains 0.60 mol N₂O₄ and 0.40 mol NO₂ at a total pressure of 100 kPa. Calculate KpK_p (kPa) for N2O4⇌2NO2\mathrm{N_2O_4\rightleftharpoons2NO_2}.

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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0031 markL2 StandardCalculatorKp
Increasing total pressure on an equilibrium mixture
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0041 markL2 StandardCalculatorKsp
The Ksp expression for PbI₂ is
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0071 markL2 StandardCalculatorKsp
A precipitate forms when
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0091 markL2 StandardCalculatorPartition
To extract a solute efficiently from water into an organic solvent, it's better to use
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0101 markL2 StandardCalculatorKp
For an exothermic gas equilibrium, raising the temperature
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0111 markL2 StandardCalculatorKsp
The units of Ksp for AgCl are
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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0052 marksL3 ExamCalculatorKsp
Ksp(AgCl)=1.8×10−10K_{sp}(\mathrm{AgCl})=1.8\times10^{-10} mol² dm⁻⁶. Calculate the solubility of AgCl in water (×10⁻⁵ mol dm⁻³).

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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0062 marksL3 ExamCalculatorKsp
Solid AgCl is added to 0.100 mol dm⁻³ NaCl. Using Ksp=1.8×10−10K_{sp}=1.8\times10^{-10}, calculate the solubility of AgCl (×10⁻⁹ mol dm⁻³).

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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0082 marksL3 ExamCalculatorPartition
Iodine partitions between hexane and water with Kpc=[I2]hex/[I2]aq=85K_{pc}=[\mathrm{I_2}]_\text{hex}/[\mathrm{I_2}]_\text{aq}=85. If [I2]aq=0.0020[\mathrm{I_2}]_\text{aq}=0.0020 mol dm⁻³ at equilibrium, find [I2]hex[\mathrm{I_2}]_\text{hex} (mol dm⁻³).

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Salam Academy Original Practice · Proposed mark scheme
SA-AC-KP-0122 marksL3 ExamCalculatorKp
In H2+I2⇌2HI\mathrm{H_2+I_2\rightleftharpoons2HI} at equilibrium, pH2=20p_{\mathrm{H_2}}=20, pI2=20p_{\mathrm{I_2}}=20, pHI=140p_{\mathrm{HI}}=140 kPa. Calculate KpK_p.

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Salam Academy Original Practice · Proposed mark scheme