Question
A chemical compound is found to have the following composition: C = 19·5%, Fe = 15·2%, N = 22·8%, K = 41·5%. Calculate the empirical formula of the compound. What will be the molecular formula if the molecular mass of the compound is 368? Name the compound also.
Solution
(i) To calculate the empirical formula of the compound.
Empirical formula of the compound
(ii) To calculate the molecular formula of the compound:
Empirical formual mass = 6 x 12 + 56 +6 x 14 + 4 x 39
= 72+56+84+156
=368 (given)
Molecular mass = 368
Hence molecular formula is
Name of compound is Potassium ferrocyanide.
Empirical formula of the compound
(ii) To calculate the molecular formula of the compound:
Empirical formual mass = 6 x 12 + 56 +6 x 14 + 4 x 39
= 72+56+84+156
=368 (given)
Molecular mass = 368
Hence molecular formula is
Name of compound is Potassium ferrocyanide.
