Question

copper sulphate contains 66.6% copper. Copper contain 79.9% . copper sulfur trioxide contains 40% sulphur show that these data illustrates law of reciprocal proportion
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Answer 1

Answer:

In copper sulphides: Cu : S mass ratio is 66.6 : 33.4 In sulphur trioxide: O : S O:S mass ratio is 60:40 Now in CuS: 33.4 parts of sulphur combines with 66.6 parts of Cu.40.0 parts of sulphur combines with 66.6 x 40/33.4 = 79.8 parts of Cu.Now the ratio of masses of Cu and O which combines with same mass 40 parts of sulphur separately is 79.8:60 …1 Cu : O ratio by mass in CuO is 79.9: 20.1 …2Which is simple whole number ratio hence law of reciprocal proportion is proved.

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