AIM:-
To show that carbon (iv) oxide ia given out by rat (a small mammal).
MATERIALS:-
Three gas jars, a conical flask, caustic soda, lime water, small rat and delivery tube.
METHOD:-
The experiment should be set up as shown below.
OBSERVATION:-
Any carbon (iv) oxide in the air entering the apparatus is removed by caustic soda in the first gas jar. This is confirmed by the lime water in the second gas jar, which reminded that flask containing the rat is free of carbon (iv) oxide. After a short time, the lime water in the last gas jar began to turn milky indicating that the air reaching it contained carbon (iv) oxide. The carbon (iv) oxide could only have been produced by the small rat.
CONCLUSION:-
This shows that carbon (iv) oxide is given out by rat...