Gcse equilibrium - Phoenix Hoyle | Library

2

Answer for pressure

Pressure 

200 atmospheres pressure

 high pressure gives a _______  yield of ammonia 

too high a pressure causes risk of _______  / high pressure costly to maintain 

a high pressure will cause the _______  to be higher 

4 moles of gas become 2 (or _______  moles of gas in products)

Word bank  

explosion / fewer / high / rate

5

Answer for temperature

450 °C 

A higher temperature _______  the rate of reaction (more frequent and more forceful collisions)

optimum temperature 

The forward reaction is _______  so) a higher yield of ammonia requires a _______  temperature

but too low a temperature causes the rate of reaction to be too _______ 

The temperature is a compromise between rate (better at higher temperatures) and yield.(better at lower temperatures as the reverse reaction is exothermic and an increase in temperature favours the _______  direction) 

Word bank: Increases / endothermic / exothermic / lower / slow

1

Answer for catalyst

iron catalyst 

A catalyst _______  up the reaction by providing an alternative pathway of _______  activation energy.

an iron catalyst allows a lower temperature to be used (saving energy)
iron catalyst increases the rate of reaction equally in _______  reactions

Word Bank: both / higher / lower / speeds /

3

A student conducts an investigation to find out what is produced during the electrolysis of sodium sulfate.
Describe how the student could carry out an investigation, and show (using ions) what is given off at each electrode.
Wearing safety ______________________ , add sodium sulfate ______________________  to a beaker, and connect two ______________________  electrodes (make sure they do not touch) to a power supply.
Completely fill two small test tubes with sodium sulfate solution and position a test tube over each electrode, then turn on the power supply and observe what happens at each electrode.