Calculating Gradients (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Calculating Gradients
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Gradient of a graph

How steep a line is

What does gradient show about a reaction?

How quickly the reaction is happening

Purpose of calculating gradient on rate graph

Determine rate of reaction at any particular moment

What is a tangent line?

Straight line touching curve at one point, doesn't cross

First step to calculate gradient

Draw a tangent to the curve

Change in y-axis represents

Change in amount of substance

Change in x-axis represents

Change in time

Formula for gradient

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

What does gradient give you?

Rate of reaction at that point

Rate if gas changes by 1010 cm³ in 22 s

55 cm³/s

Why use tangents for rate of reaction?

Measure rate at specific moment, not average

What do tangents help us understand?

How reaction speed changes over time

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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