Calculating Gradients (AQA GCSE Chemistry): Quizzes

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Calculating Gradients
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12 questions from this quiz

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What does the gradient of a graph tell us?

How steep a line is

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

To find rate at a particular moment

What is a tangent to a curve?

A line touching curve at one point

What is the first step in calculating the gradient?

Draw a tangent at the chosen point

How do you find the change in amount of substance?

Difference between y-axis points

How do you find the change in time?

Difference between x-axis points

What is the formula for calculating gradient?

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

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

5 cm3/s5 \text{ cm}^3/\text{s}

What units could be used for measuring change in amount?

Grams, cm3\text{cm}^3, or moles

Why do we use tangents rather than average rates?

To measure rate at a specific moment

What does the gradient at a point tell us about a reaction?

How quickly it's happening then

Why is calculating gradient useful for reactions?

Rate often changes as it progresses

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