What is x in BaCl2.xH2O?

Question

What is x in BaCl2.xH2O?

Answer 1

BaCl2.2H2O is the common hydrate of BaCl2.

Answer 2

x is the "hydration number" and tells the number of water molecules that are incorporated into the crystalline structure of solid (hydrated) barium chloride.

The most common hydrate of barium chloride contains two water molecules for each BaCl2 formula unit.

Or we can write: BaCl2.2H2O

Answer 3

For show and i think it is easier??

I will use "anhydrous compound as 8.53g"

& 10g of hydrated barium chloride. Just to show you!!

Moles of BaCl anhydrous = mass/moles = 8.53/208 = 0.041

1:1 ratio of Hydrous to Anhydrous

Therefore 0.041 Moles of Hydrous

Mr of Hydrous = mass/moles

Mr = 10/0.041 = 244

Mr of Hydrous = 244

Mr of xH2O = 244 - 208 = 36

Mr of one H2O molecule is 18

36/18 ... therefore x=2

All the best - add me as a contact for further Chem help??