Question

Air was passed through several reagents as shown below

1. Name the main inactive component of air 
2. Name the components of air that are removed in the following chambers 
   1. Chamber 1
   2. Chamber 3
   3. Chamber 4
3. What is the purpose of passing air through concentrated sulphuric (vi) acid. 
4. Write a chemical equation for the reaction which takes place in :-
   1. chamber 1 
   2. Chamber4 
5. State and explain the observation made in chamber 3 during reaction 
6. Name one gas which escapes from the scheme above 

Answer 1

1. Nitrogen gas
2.  
   • Chamber 1 - Carbon (iv) oxide gas
   • Chamber 3 - Oxygen gas
   • Chamber 4 - Nitrogen
3. To remove/absorb water vapour or dry / drying agent.
4.    
   • chamber 1 (1mk)
     2 NaOH(Aq) +CO2(g) → Na2CO3(S)+H2O (L)√1
   • Chamber4 (1mk)
     3Mg (s) +N2 (g) → Mg3N2(S)√1
5.    
   • Brown solid changes to black√1
   • Brown copper metal oxidized/ reacts with oxygen to form copper (II) oxide (black)
6.   
   • Argon
   • Neon
   • Helium