Carbon a Dioxide Production can be Detected using an Indicator

Question 1

What can you use to show that living organisms produce CO2 as they respire?

Answer 1

Hydrogen-carbonate solution

Question 2

What colour does it change to in the present of CO2?

Answer 2

Yellow

Question 3

What colour is the solution normally?

Answer 3

Orange

Question 4

What do you do first? (Soak)

Answer 4

Soak some dried beans in water for a day or two - they will germinate - respire

Question 5

What do you do second? (Boil)

Answer 5

Boil a similar-sized second bunch of dried beans - kill them - can’t respire

Question 6

What do you put into two test tubes?

Answer 6

Hydrogen-carbonate indicator

Question 7

What do you place into each test tube and place the beans on?

Answer 7

A platform made of gauze

Question 8

What do you seal the test tubes with?

Answer 8

A rubber bung

Question 9

What happens whilst you leave the apparatus?

Answer 9

The CO2 produced should have had an effect on the hydrogen-carbonate indicator - turning it yellow from germinating beans

Question 10

What can you also carry out this experiment with?

Answer 10

Woodlice or maggots