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This quiz contains 20 questions from a mix of 1 subtopics.

To measure the rate of a reaction, we can either measure how fast the  are being used up, or how fast the  are being formed.

reactants
products

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2

Which of the following are the equations to calculate the overall rate of a reaction?

(Select all that apply).

Rate of reaction = time takenquantity of reactants used​
Rate of reaction = quantity of products formed x time taken
Rate of reaction = time takenquantity of products formed​
Rate of reaction = quantity of reactants used x time taken

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2

Which of the following could be units for the rate of a reaction?

(Select all that apply).

cm3 s-1

m s-1

g min-1

mol s-2 

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2

In the following reaction, 90 cm3 of hydrogen gas was produced after 5 mins:

Mg(s) + 2HCl(aq) ➔ MgCl2(aq) + H2(g)

What is the average rate of reaction? Give your answer in cm3 s-1.

0.3

cm3 s-1

cm3 s-1

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1

What would the units of the y-axis be?

mol

s

cm3

g

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1

The above graph shows how the quantity of a substance changes over the course of a reaction. Is the substance a reactant or a product?

reactant 

product

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1

The graph above shows how the quantity of hydrogen produced changed over time in the reaction between sodium and hydrochloric acid.

Describe and explain the shape of the graph.

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3

Name five factors that affect the rate of chemical reactions.

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5

theory states that for particles to react, they have to collide with sufficient energy. The minimum amount of energy required for a reaction to take place is called the energy.

Collision
activation

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2

When considering how a condition will affect the rate of reaction, you have to consider how it will affect the  of effective collisions, and/or the  of the particles.

frequency
energy

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2

Illustration of two particles colliding with a burst of energy.

Which of the following increase the frequency of effective collisions of the particles in a reaction?

(Select all that apply).

increasing the concentration

using powder instead of small chunks

decreasing the pressure

increasing the temperature

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3

3 g of magnesium is added to water.

Which form of magnesium would give the highest rate of reaction?

small chunks

powder

one large piece 

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1

On the image above, which of the lines represents the activation energy of the reaction?

A

B

C

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1

Which of the following increase the rate of a reaction?

(Select all that apply).

increasing the pressure of a gas

decreasing the temperature

using lumps instead of powder

increasing the temperature

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2

Which of the following increase the amount of energy the particles in a reaction have?

using a catalyst

using powder instead of small chunks

decreasing the concentration of a solution

increasing the temperature

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1

Which of the following is the equation to calculate the gradient?

Gradient =ΔxΔy​
Gradient =ΔyΔx​

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1

By finding the gradient of the tangent to a curve at a specific time, we can calculate the:

rate of reaction at a specific time

mean rate of reaction

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1

Graph comparing reaction rates with lines indicating volume of product produced over time for blue and red reactions.

In the above graph, which of the following lines indicates a faster reaction?

blue

red

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1

Graph showing the mass of reactant in grams decreasing over time in seconds.

Using the above graph, what is the mean rate of reaction in the first 20 seconds?

Give your answer in g s-1.

0.075

g s-1

g s-1

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1

Graph showing the volume of product produced over time in seconds.

Using the above graph, what is the mean rate of reaction in the first 30 seconds?

Give your answer in cm3 s-1.

0.2

cm3 s-1

cm3 s-1

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1