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Year 10 rates of reaction

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Last updated over 1 year ago
15 questions
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Question 1
1.

I know how to calculate the mean rate of a reaction over a given time

__________
Question 2
2.
Work out the average rates of reaction for the time periods given.
a) average rate between 0 and 6 seconds = (change in volume / time = 11/6) _______ cm3/s
b) average rate between 3 and 10 seconds = (Change in volume / time = 13/8) _______ cm3/s

c) The reaction ends at _______ s
Question 3
3.

Show your calculations

Question 4
4.

I know that I need to draw a tangent to calculate the rate of reaction at a given time

__________

Question 5
5.

I know how to draw a triangle to calculate the gradient of the tangent.

(note your should make the large to minimise error and use values that are easy to read from the graph)


__________
Question 6
6.

I can use a tangent to calculate the gradient of a line__________


Question 7
7.
On the show your work section draw the triangles that you need to calculate the rates of reaction.
The rate of reaction at 2 seconds is _______ g/s
The rate of reaction at 15 seconds is _______ g/s
Note that as the concentration of he reactants decreases the rate of reaction also _______
This is seen on the graph as the slope of the line _______
Question 8
8.
State and explain how increasing concentration affect the rate of reaction.

A greater concentration means that there are _______ particles in a given _______ ; the particles are _______ together. This means that there will be more _______ collisions and therefore a _______ rate of reaction

Word bank

closer
frequent
greater
more
volume
Question 9
9.
State and explain how increasing the surface area affect the rate of reaction

A greater surface _______ to _______ ratio means that there is a greater surface area on the reactants for the particles to _______ upon. This will result in more _______ collisions and therefore a greater rate of reaction.

Note only the particles on the _______ surface of a solid can be collided with and so take part in the reaction.

Word bank

area
collide
frequent
outer
volume
Question 10
10.
State and explain how a catalyst affect the rate of reaction.
A catalyst _______ up the rate of reaction by providing an _______ path of _______ _______ energy.

Word bank
activation
alternative
lower
Speeds
Question 11
11.
State and explain how does an increase in temperature affects the rate of reaction.

A greater temperature gives the particles more _______ energy. This means that the particles move around _______ , which leads to more _______ collisions, thus _______ the rate of reaction.

Also, as the particles have more _______ due to the higher temperature, more energy will be transferred during a _______ between the particles. This greater energy transferred between the particles during a collision is more likely to satisfy the _______ energy, thus resulting in a reaction taking place. So, a greater temperature increases the rate of _______

Word bank
activation
collision
energy
faster
frequent
increasing
kinetic
reaction
Question 12
12.

Increase rate of reaction
Decrease rate of reaction
More dilute acid
More concentrated acid
Higher temperature
Powdered magnesium
Question 13
13.

Rate of reaction graphs

Question 14
14.

(Hint the acid is in a large excess).

Question 15
15.

When a piece of marble is added to hydrochloric acid, bubbles of carbon dioxide gas are given off. Which method is used to find the rate of the reaction?