ANSWERS 



TO THE 



PRACTICAL QUESTIONS AND PROBLEMS 



IN 



STEELE'S POPULAR CHEMISTRY. 



[The large figures refer to the page of the Chemistry, and the small 

 ones to the number of the questions.] 



26 ! What becomes of the ivater that " dries up " ? 

 Of the wood that " burns up " ? Is there any destruction 

 of the matter they contain ? 



The water is changed into invisible vapor, and wafted thus 

 away. 



The wood is oxidized into CO 3 and H 2 O, which mingle with 

 the air. The ashes consist of SiO 2 , K 2 CO 3 , and the oxides of 

 any other elements present whose compounds with O are not 

 gaseous. 



There is no destruction of the matter contained. 



2. Where is the higher oxide formed, at the forge or in 

 the pantry ? 



There is more complete oxidation at the forge. At low 

 temperatures, decomposition results often in complex products. 



3. Wlty is the blood red in the arteries, and darle in the 

 veins ? 



When specimens of venous and of arterial blood are sub- 

 jected to chemical examination, the differences presented by 

 their solid and fluid constituents are found to be very small and 

 inconstant. As a rule, there is rather more water in arterial 

 blood, and rather more fatty matter. But the gaseous contents 

 of the two kinds of blood differ widely in the proportion which 



