Learning objective
Calculate mole fractions and partial pressures.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
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Questions
Topic
Equilibrium constant Kp for homogeneous systems (A-level only)
Subtopic
Kp and partial pressure (A-level only)
Study support
Understand this objective
Quick explanation
Calculate mole fractions and partial pressures
- This point belongs to Equilibrium constant Kp for homogeneous systems (A-level only), especially Kp and partial pressure (A-level only).
- You need to be able to calculate mole fractions and partial pressures.
- The key ideas to know are partial pressure and mole fraction.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Kp and partial pressure (A-level only) to exam-style questions, flashcards, and revision notes for Equilibrium constant Kp for homogeneous systems (A-level only).
Quick student answer
What is the partial pressure of a gas in a mixture if the total pressure is 2.0 atm and the mole fraction of the gas is 0.25?
Direct answer
The partial pressure can be calculated using the formula: Partial Pressure = Mole Fraction × Total Pressure.
Key terms
- Partial Pressure: The pressure exerted by a single component of a gas mixture.
- Mole Fraction: The ratio of the number of moles of a specific component to the total number of moles in the mixture.
Common trap
Incorrectly calculating mole fractions: Always ensure to calculate the total number of moles in the mixture before finding the mole fraction.
Related questions
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Flashcard prompts
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Revision tools
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Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Define partial pressure in a gas mixture.
Kp and partial pressure (A-level only)
- Construct Kp expressions for gaseous homogeneous equilibria.
Kp and partial pressure (A-level only)
- Calculate Kp and determine appropriate units.
Kp and partial pressure (A-level only)
- Interpret Kp values in terms of equilibrium position.
Kp and partial pressure (A-level only)