Rate Graphs (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
What are rate graphs?
What are rate graphs?
Visual tools showing how reactants/products change over time
Direction of reactant curve on rate graph
Direction of reactant curve on rate graph
Slopes downwards (reactants being used up)
Direction of product curve on rate graph
Direction of product curve on rate graph
Slopes upwards (product being formed)
What does the steepest part of the curve indicate?
What does the steepest part of the curve indicate?
Fastest reaction rate
Why does the curve become less steep during reaction?
Why does the curve become less steep during reaction?
Fewer reactant particles to collide, reaction slows
What does a plateau (flat curve) indicate?
What does a plateau (flat curve) indicate?
Reaction stopped - no reactants left or equilibrium reached
How do you find rate from a rate graph?
How do you find rate from a rate graph?
Calculate the gradient (slope) of the curve
What is a tangent on a curve?
What is a tangent on a curve?
Straight line touching curve at one point without crossing
Formula for rate of reaction
Formula for rate of reaction
Calculate: gas produced in
Calculate: gas produced in
Why is reaction fastest at the beginning?
Why is reaction fastest at the beginning?
Many reactant particles available to collide
Why does reaction slow as it continues?
Why does reaction slow as it continues?
Fewer reactant particles left to collide