288 



Domestic Science 



Exercise for Student. 



Make up the equations for the reactions which occur in the cases 

 of each of the other acids and metals used. Acetic acid is known 

 as hydrogen acetate. 



199. Our next investigation will be concerned with 

 the nature of the product formed by the burning of 

 hydrogen. We already know that, in burning, the 

 oxygen of the air combines with the substance burnt 

 to form a new compound, called an oxide. This 



Fig. 95. 



is also what happens when hydrogen burns, and the 

 product hydrogen oxide is the familiar substance, 

 water. 



EXPERIMENT 134. Arrange an apparatus for the 

 preparation of hydrogen, drying the gas by means 

 of a calcium chloride tube. To the end of the delivery- 

 tube a platinum jet is attached. This is necessary, 

 since the temperature of the flame of burning hydrogen 

 is extremely high, and the edges of a glass jet would 



