Answer to Question #223527 in General Chemistry for jojo

Question

A 22.75 gram sample of copper is heated in the presence of excess chlorine. A metal chloride is formed with a mass of 35.44 g. Determine the empirical formula of the metal chloride.

Answer 1

Cu molar mass us 63.55g/mol

22.75 g corresponds to 22.75g/(63.55g/mol)

= 0.357 mol

Reacting with chlorine it could fofn CuCl or CuCl₂ .

Chlorine molar mass is 35.50 g/mol

So CuCl molar mass is 99g/mol and

CuCl₂ molar mass is 134.55g/mol

For CuCl is = 0.357×99 = 35.343g

Which is corresponds to 35.50g

Hence CuCl is the empirical formula