Question

. Calculate the percentage composition
• Potassium in potassium chlorate (K =39, CI= 35.5,
O=16)​

Answer 1

Answer:

Relative molecular mass of KClO

3

=39.09+35.5+(3×16)

=122.59g

122.59gKClO

3

contains 39.09gK

Hence, 100gKClO

3

contains

=

122.59

100×39.09

=31.9g

122.59gKClO

3

contains 35.5gCl

Hence, 100gKClO

3

contains

=

122.59

100×35.5

=28.9g

122.59gKClO

3

contains 48gO

Hence, 100gKClO

3

contains

=

122.59

100×48

=39.1g

The percentage of K,Cl and O in KClO

3

are 31.9%,28.9% and 39.1% respectively.