H + H + O = H2O.
This is a condensation of one-third.
If 2 l. of chlorhydric acid gas be analyzed, there will result 1 l. of H and 1 l. of Cl. The same relation exists between the molecules and the atoms, and the reaction is:—
HCl = H + Cl.
Reverse the process, and 1 l. of H unites with 1 l. of Cl to produce 2 l. of the acid gas; there is no condensation, and the symbol is HCl. In seven volumes HCl how many of each constituent?
The combination of two volumes of H with one volume of S is found to produce two volumes of hydrogen sulphide. Therefore two atoms of H combine with one of S to form a molecule whose symbol is H2S.
H + H + S = H2S.
What is the condensation in this case?
PROBLEMS.
(1) How many liters of S will it take to unite with 4 l. of H? How much H2S will be formed?