Question

Sulfur forms two compounds with oxygen. In the first compound, 1.000 g sulfur is combined with 0.998 g oxygen, and in the second, 1.000 g sulfur is combined with 1.497 g oxygen. Show that these results are consistent with Dalton s law of multiple proportions.

Answer 1

Sulfur forms two compounds with oxygen. In the first compound, 1.000 g sulfur is combined with 0.998 g oxygen, and in the second, 1.000 g sulfur is combined with 1.497 g oxygen. Show that these results are consistent with Dalton s law of multiple proportions.

Solution:

in the first compound sulfur =1.000g and oxygen =0.998g

in the first compound number of parts of sulfur that combine with one part by mass of oxygen $\frac{1.000}{0.998}=1.002parts$

in the second compound sulfur =1.000g and oxygen =1.497g

in the first compound number of parts of sulfur that combine with one part by mass of oxygen $\frac{1.000}{1.497}=0.668 parts$

Ratio of the masses of sulfur that combine with fixed mass of oxygen: 1.002:0.668 or 3:2. Hence This is consistent with the law of multiple proportions.