Rates Of Reaction 2

Question 1

What’s the aim of the 1st experiment?

Answer 1

To investigate the reaction between sodium thiosulphate and hydrochloride acid.

Question 2

How is the 1st experiment made fair?

Answer 2

Only the concentration of thiosulphate is changed. The acid concentration is kept constant.

Question 3

What’s the aim of the 2nd experiment?

Answer 3

To investigate the reaction between magnesium ribbon and hydrochloric acid that depends on the concentration of the acid.

Question 4

What’s step 1 in 1st experiment?

Answer 4

Measure the volume of sodium thiosulphate concentration and add it to the hydrochloric acid in the conical flask

Question 5

What’s step 2 in 1st experiment?

Answer 5

Time how long it takes for the cross on the bottom of the conical flask to disappear using a stop watch.

Question 6

What’s step 3 of 1st experiment?

Answer 6

Change the concentration of sodium thiosulphate by adding a smaller volume of solution to the flask and then adding water to make the volume 50cm3. Repeat step1+2 multiple times for each concentration.

Question 7

What’s step 1 of 2nd experiment?

Answer 7

Choose an acid concentration (1M or 2M)

Question 8

What’s step 2 of 2nd experiment?

Answer 8

Record a set time and time the reaction with it. Record the volume of gas produced after that set time.

Question 9

What’s step 3 for 2nd experiment?

Answer 9

Change the reaction time and repeat the steps to obtain a series of values of volumes of gas and time.