9.9 Flashcards
1
Q
why are catalysts used in the industry ?
A
- lowers the temperature needed for a reaction to proceed - less money spent and less CO2 produced
- speeds up the reaction by providing an alternative pathway for the reaction to proceed
- change the properties of a product
2
Q
what are the environment benefits using a catalyst ?
A
- lower temperatures and reduces CO2 produced
- less waste produced as catalysts can allow scientists to use reactions with better atom economies
3
Q
how can rate be measured in experiments ?
A
- how long it takes for precipitate to form
- amount of mass lost
- volume of gas produced
4
Q
how long it for precipitate to form
A
Place a cross on paper and time how long it takes for cross to disappear
5
Q
what is a problem how long it for precipitate to form ?
A
this is difficult to know - exactly the cross disappears - try to use the same observer to reduce errors
6
Q
amount of mass lost
A
Place the reaction on balance and measure the mass loss as gas is lost - use a fume cupboard if the gas is harmful or toxic
7
Q
volume of gas produced
A
Measure the amount of gas using a gas syringe and measure this over a specified time
