Question

c)Calculate the percentage composition in calcium nitrate. [Ca-40, N= 14,0-16]​

Answer 1

Answer:

Hint: The ratio of amount of each element present in a compound, to total amount of individual elements present in the compound multiplied by 100 is called the percentage composition of that particular element.

Complete step by step solution:

The formula of Calcium nitrate is Ca(NO3)2

.

So, total molecular mass of the compound is given as = Atomic mass Ca + (Atomic mass of N + Atomic mass ofO3)× 2

= 40 + [ 2×7 + 16×6]

The formula of Calcium nitrate is Ca(NO3)2

= 150

The formula to calculate percentage composition of individual element is

%X=Mass of XTotal molecular mass of compound×100

So, we calculate the % of Ca as-

%Ca=Mass of CaTotal molecular mass of compound×100

%Ca=40150×100

= 26.6

For Nitrogen, %N=14150×100=9.33

For Oxygen, %O=96150×100=64

So, in Calcium nitrate - Calcium is 26.6%, Nitrogen is 9.33% and Oxygen is 64%.