Required Practical: Investigating the Effect of Concentration on Rate of Reaction (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
Objective of concentration practical
Objective of concentration practical
Investigate how HCl concentration affects reaction rate
Gas Collection method measures
Gas Collection method measures
Volume of gas produced
Reactants in Gas Collection method
Reactants in Gas Collection method
Magnesium and hydrochloric acid
Vol. of HCl in Gas Collection (cm³)
Vol. of HCl in Gas Collection (cm³)
25
Interval to record gas volume
Interval to record gas volume
Every 10 seconds
Clean magnesium strip with
Clean magnesium strip with
Emery paper
Disappearing Cross method measures
Disappearing Cross method measures
Time for reaction mixture to turn cloudy
Reactants in Disappearing Cross method
Reactants in Disappearing Cross method
Sodium thiosulfate & HCl
Stop timer when (Disappearing Cross)
Stop timer when (Disappearing Cross)
Cross no longer visible
Plot rate of reaction against
Plot rate of reaction against
Concentration of HCl
Steeper gradient on graph indicates
Steeper gradient on graph indicates
Higher rate of reaction
Vol. sodium thiosulfate used (cm³)
Vol. sodium thiosulfate used (cm³)
25
Vol. HCl in Disappearing Cross (cm³)
Vol. HCl in Disappearing Cross (cm³)
25
Draw on rate vs conc. graph
Draw on rate vs conc. graph
Line of best fit