Rate Graphs (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

Show how reactants/products change over time during reaction

Rate of reaction changes as reaction progresses

Slopes downwards (reactants used up)

Slopes upwards (more product made)

Steepest (reaction fastest here)

Plenty of reactant particles to collide and react

Less steep (fewer particles to collide)

Reaction stopped (no reactants left or equilibrium)

Calculate gradient (slope) at that point

Straight line touching curve at point, not crossing it

$\frac{\text{Change in Amount}}{\text{Change in Time}}$

Rate of reaction at that specific point in time

$5 \text{ cm}^3/\text{s}$