Year 10 rates of reaction - Phoenix Hoyle | Library

1

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

3

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

1

Show your calculations

1

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

1

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)


__________

1

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

1

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 _______ 

1

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

1

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

1

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

1

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

1

Rate of reaction graphs

1

(Hint the acid is in a large excess).

1

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?

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