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CBSE Class 11-science Answered

Copper gives two oxides.on heating 1.g of each in hydrogen gas, 0.888 and 0.799 g of metal are produced. 
Asked by msingh1376 | 13 Jul, 2018, 09:43: PM
answered-by-expert Expert Answer

Question:

Copper gives two oxide on heating 1.g of each in hydrogen gas, 0.888 and 0.799 g of metal are produced so that the results agree with the law of multiple proportions.
As space given space product space obtained space are space two space oxides space lets space assume space these space two space oxides space of space copper space be space named space straight A space and space straight B.
Oxide space straight A colon
Mass space of space Cu space in space 1 straight g space of space oxide space straight A space equals space 0.888 straight g space left parenthesis given right parenthesis
Mass space of space straight O space in space 1 straight g space of space oxide space straight A space will space be space 1 space minus space 0.888 space equals space 0.112 space straight g
1 straight g space of space Cu space is space combined space with space oxygen space equals space fraction numerator 0.112 cross times 1 over denominator 0.888 end fraction equals 0.126 space straight g

Simillarly space Oxide space straight B
Mass space of space Cu space in space 1 straight g space of space oxide space straight B space equals space 0.799 straight g space left parenthesis given right parenthesis
Mass space of space straight O space in space 1 straight g space of space oxide space straight B space will space be space 1 space minus space 0.799 space equals space 0.201 space straight g
1 straight g space of space Cu space is space combined space with space oxygen space equals space fraction numerator 0.201 cross times 1 over denominator 0.799 end fraction equals 0.252 space straight g

The space different space weights space of space oxygen space combined space with space straight a space fixed space weight space straight i. straight e. comma space 1 straight g space of space Cu space are space in space the space ratio space 0.126 colon 0.252 space equals space 1 colon 2
The space obtained space ratio space is space straight a space simple space whole space ratio space which space shows space the space rsult space agree space with space the space law space of space multiple space proportion.
Solution:
Answered by Ramandeep | 14 Jul, 2018, 09:37: PM
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