Calculating Gradients (AQA GCSE Chemistry Combined Science): Quizzes

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Calculating Gradients
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11 questions from this quiz

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What does the gradient of a graph tell us?

How steep a line is

What can the gradient help us determine in a chemical reaction?

How quickly the reaction is happening

Why do we calculate the gradient of a curve on a rate graph?

To find the rate at a particular moment

What is a tangent to a curve?

A line touching the curve at one point

What is the first step to calculate the gradient of a curve?

Draw a tangent

Which units could be used to measure the change in amount of substance?

Grams, cm³, or moles

How do you find the change in time from a tangent?

Use horizontal lines on x-axis

What is the formula for calculating the gradient?

AmountTime\frac{\text{Amount}}{\text{Time}}

If gas changes by 10 cm310\text{ cm}^3 over 2 s2\text{ s}, what is the rate of reaction?

5 cm3/s5\text{ cm}^3\text{/s}

Why do we use tangents rather than calculating an average rate?

Tangents measure rate at a specific moment

What do tangents help us understand about a reaction?

How reaction speed changes over time

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