Required practical - Rate of reaction (AQA GCSE Chemistry Combined Science): Flashcards
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Practise the cards
15 cards from this deck
What this practical investigates
What this practical investigates
Effect of concentration on rate of reaction
Two reactants used in this practical
Two reactants used in this practical
Sodium thiosulfate and hydrochloric acid
Colour of sulfur precipitate formed
Colour of sulfur precipitate formed
Yellow
Endpoint for stopping timer
Endpoint for stopping timer
When cross can no longer be seen
Starting volume of sodium thiosulfate solution
Starting volume of sodium thiosulfate solution
50 cm
Volume of hydrochloric acid used
Volume of hydrochloric acid used
10 cm
Effect of higher concentration on time
Effect of higher concentration on time
Shorter time (faster reaction)
Essential safety equipment required
Essential safety equipment required
Eye protection (safety goggles)
Why work in well-ventilated room
Why work in well-ventilated room
Sulfur dioxide gas produced
Independent variable in this practical
Independent variable in this practical
Concentration
Dependent variable measured
Dependent variable measured
Time
Total volume kept constant for fair testing
Total volume kept constant for fair testing
50 cm
Why higher concentration increases rate
Why higher concentration increases rate
More particles, more frequent collisions
What smaller uncertainty indicates
What smaller uncertainty indicates
More reliable results
What makes solution cloudy
What makes solution cloudy
Yellow sulfur precipitate