Question

Three oxides of a metal contain respectively 92.85%,90.63% and 86.51% of thyew metal.Examine if these figure are in agreement with the law of multiple proportion.

Answer 1

Three oxides of a metal contain respectively 92.85%,90.63% and 86.51% illustrates the law of multiple proportions.

• Dalton’s law of multiple proportions:
• The mass percentage of oxygen in three oxides:
• w1(O) = 100 – 92.85 = 7.15 (%)
• w2(O) = 100 – 90.63 = 9.37 (%)
• w3(O) = 100 – 86.51 = 13.49 (%)
• The ratio of metal and oxygen masses in three oxides:
• w1(M) : w1(O) = 92.85 : 7.15 = 1 : 0.07
• w2(M) : w2(O) = 90.63 : 9.37 = 1 : 0.10
• w3(M) : w3(O) = 86.51 : 13.49 = 1 : 0.15
• The ration of oxygen masses: 0.07 : 0.10 : 0.15 = 1 : 1.5 : 2