1.

Illustrate the law of reciprocal proportions from the following data: KCl contains 52.0% potassium, KI contains 23.6% potassium and Icl contains 78.2% iodine.

Answer»

Solution :In KCL: Potassium 52.0%
Chlorine (100-52)=48%
In KI: Potassium 23.6%.
IODINE (100-23.6)=76.4%
23.6 parts of potassium combine with 76.4 parts of iodine
52.0 parts of potassium will combine with
(76.4/23.6)`xx52.0=168.3` parts of iodine.
The RATIO of masses of chlorine and iodine which combines with same mass of potassium =48:168.3 or 1:3.5
In ICI: Iodine =78.2% and chlorine
`=(100-78.2)=21.8%`
The ratio of chlorine and iodine in ICI=21.8:78.2=1:3.5.
Hence, the DATA ILLUSTRATE the law of reciprocal proportions.


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