ChemistryChapter 19: Chromatography
Solvent Mix
A common solvent is water:ethanol 6:4.
Learning objectives
- Define and explain solvent mix.
- Apply solvent mix to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Definition
A common solvent is water:ethanol 6:4. For 25 cm3 of mix that means 15 cm3 water + 10 cm3 ethanol. Measure both, pour them into the cylinder, and swirl gently.
Important terms
- Solvent Mix
- A common solvent is water:ethanol 6:4. For 25 cm3 of mix that means 15 cm3 water + 10 cm3 ethanol. Measure both, pour them into the cylinder, and swirl gently.
Overview
Learn the idea, then use it:
Core Understanding
A common solvent is water:ethanol 6:4. For 25 cm3 of mix that means 15 cm3 water + 10 cm3 ethanol. Measure both, pour them into the cylinder, and swirl gently.
Examples water:ethanol 6:4 · 25 cm3 · 15 cm3 water · SOLVENT MIX: A common solvent is water:ethanol 6:4. For 25 cm3 of mix that means 15 cm3 water + 10 cm3 ethanol. Measure both, pour th
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 — SOLVENT MIX
A common solvent is water:ethanol 6:4. For 25 cm3 of mix that means 15 cm3 water + 10 cm3 ethanol. Measure both, pour them into the cylinder, and swirl gently.
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 solvent mix with a neighbouring idea that uses a different definition, rule, or method.
Key points
- water:ethanol 6:4
- 25 cm3
- 15 cm3 water
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Solvent Mix
Sticky Notes · Quick Revision
Core Idea
- A common solvent is water:ethanol 6:4.
Key Points
- water:ethanol 6:4
- 25 cm3
- 15 cm3 water
Simple Check
- Explain solvent mix 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 solvent mix 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
- A common solvent is water:ethanol 6:4.
- water:ethanol 6:4
- 25 cm3
- 15 cm3 water
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