ChemistryChapter 19: Chromatography
Choosing the Stationary and Mobile Phases
Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
Learning objectives
- Define and explain choosing the stationary and mobile phases.
- Apply choosing the stationary and mobile phases to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Definition
Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
Important terms
- Choosing The Stationary And Mobile Phases
- Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
Overview
Learn the idea, then use it:
Core Understanding
Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
Examples choosing the stationary and mobile phases · understand the idea · apply it carefully
Exam Application
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Examples Define first · Show the rule or evidence · Check units, labels, and conclusion
WHAT — CHOOSING THE STATIONARY AND MOBILE PHASES
Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
HOW — Use the idea
Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.
In simple words
Do not merge choosing the stationary and mobile phases with a neighbouring idea that uses a different definition, rule, or method.
Key points
- choosing the stationary and mobile phases
- understand the idea
- apply it carefully
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Choosing the Stationary and Mobile Phases
Sticky Notes · Quick Revision
Core Idea
- Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
Key Points
- choosing the stationary and mobile phases
- understand the idea
- apply it carefully
Simple Check
- Explain choosing the stationary and mobile phases in your own words and connect it to one chapter example.
How to Answer
- Define the idea, show the main rule or evidence, apply it, and check the final statement.
Common Mistake
- Do not merge choosing the stationary and mobile phases with a neighbouring idea that uses a different definition, rule, or method.
FBISE Exam Tip
- Use the exact term, show working where needed, and include units or labelled evidence.
60-second revision
- Separation depends on how strongly each substance is attracted to the stationary phase and dissolved in the mobile phase.
- choosing the stationary and mobile phases
- understand the idea
- apply it carefully
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