The diagram below represents a set up during an experiment

(a) (i) What was the experiment investigating?
ii) State the likely identify for substance K
iii) Explain your answer in (a) (ii) above
b) Account for the observation made in flask 2

Answer:

a) i)
- To investigate how ants respond to moisture.
ii)
- Concentrated sodium hydroxide/concentrate sulphuric acid.
iii)
- The colour of cobalt (II) chloride paper remains blue, all moisture/ water vapour was absorbed in the flask by the drying agent.
b)
- Ants respond positively to moisture hence more ants moved to flask 2caused cobalt chloride paper to turn pink.

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The diagram below represents a set up during an experiment

(a) (i) What was the experiment investigating?
ii) State the likely identify for substance K
iii) Explain your answer in (a) (ii) above
b) Account for the observation made in flask 2