REQ.PRAC of chanes in concentration affecting rate of reaction

Question 1

method

Answer 1

1) set up equipment
2) add hydrochloric acid to flask and swirl to mix reactants
3) start timer
4) watch cross through flask
5) when cross is no longer visible, stop timer
6) repeat exp hating hydrochloric acid at different concentrations

Question 2

hazards and risks

Answer 2

• corrosive acid can damage eyes

- sulfur dioxide gas can trigger asthma attacks, temp must be kept below 50°C

Question 3

considerations

Answer 3

should be a correlation between concentration of acid and time taken for it to ‘disappear’