Question

Four g of a metallic chloride contains 1.89 g of the metal ‘X’. Calculate the empirical formula of the metallic chloride. [At. wt. of ‘X’ = 64, Cl = 35.5]

August 2, 2024

Answer

4 g of metallic chloride contains 1.89 g of metal X

∴ 100 g of metallic chloride contains $1.89\over4$ × 100 = 47.25 g of metal X

∴ % of Cl in the metallic chloride = 100 – 47.25 = 52.75%.

Element	% composition	At. wt.	Relative no. of atoms	Simplest ratio
X	47.25	64	= 0.738	= 1
Cl	52.75	35.5	= 1.48	= 2

X : Cl = 1 : 2

Hence, empirical formula is XCl₂

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