RP3 Effect of temperature on rate of a reaction

Question 1

How can rate of reaction be measured

Answer 1

Initial rates method ie iodine clock
Continuous monitoring eg measuring volume of gas released in a reaction over time

Question 2

Investigate how rate of reaction changes with temperature (sodium thio)

Answer 2

Time how long it takes for a cross underneath the beaker to disappear, using a stopwatch
Repeat at 5+ different temperatures

Question 3

What are some issues with disappearing cross

Answer 3

Judged by eye and can be unreliable
Delayed reaction time with stopwatch
At low temps the reaction may be too slow
May not be enough ppt for cross to disappear

Question 4

How can we keep a substance at a constant temp

Answer 4

waterbath