Key term for OCR GCSE Chemistry A, used in Practical Activity Groups.
A porous barrier placed in a flask to prevent liquid loss (acid spray) while allowing gas to escape.
Cotton wool plug appears in OCR GCSE Chemistry A revision content for Practical skills, especially Practical Activity Groups and Measuring Rates of Reaction Practical.
Practical skills
Measuring Rates of Reaction Practical
Global challenges
Rate Graphs
Global challenges
Rate Calculation Arithmetic
Monitoring and controlling chemical reactions
Surface Area Effects
Practical skills
Practical Activity Groups • Measuring Rates of Reaction Practical
Global challenges
Improving processes and products • Rate Graphs
Global challenges
Improving processes and products • Rate Calculation Arithmetic
Monitoring and controlling chemical reactions
Controlling reactions • Surface Area Effects
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