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0 of 10 objectives have lessons · 0 studied · 0 secure
Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand and use the terms conjugate acid and conjugate base.
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Define conjugate acid–base pairs, identifying such pairs in reactions.
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Define mathematically the terms pH, Ka, pKa and Kw and use them in calculations.
Kb and the equation Kw = Ka × Kb will not be tested.
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Calculate [H⁺(aq)] and pH values for: (a) strong acids; (b) strong alkalis; (c) weak acids.
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(a) Define a buffer solution; (b) explain how a buffer solution can be made; (c) explain how buffer solutions control pH, using chemical equations in these explanations; (d) describe and explain the uses of buffer solutions, including the role of HCO₃⁻ in controlling pH in blood.
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Calculate the pH of buffer solutions, given appropriate data.
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Understand and use the term solubility product, Ksp.
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Write an expression for Ksp.
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Calculate Ksp from concentrations and vice versa.
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(a) Understand and use the common ion effect to explain the different solubility of a compound in a solution containing a common ion; (b) perform calculations using Ksp values and the concentration of a common ion.
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