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Standard IX
Chemistry
Law of Reciprocal Proportions
Aluminium oxi...
Question
Aluminium oxide contains 52.9% aluminium and carbon dioxide contains 27.27% carbon. Assuming the validity of the law of reciprocal proportions, calculate the percentage of aluminium in aluminium carbide.
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Solution
In carbon dioxide mass ratio
=
72.73
27.27
In
A
l
4
C
3
→
4
×
A
l
+
C
×
3
=
4
×
27
+
12
×
3
=
108
+
36
=
144
Fraction of carbon
=
108
14
=
0.25
=25%
Fraction of Aluminium
=
108
144
=
0.75
=75%
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