What is the percent water in the compound barium chloride dihydrate?
As its name suggests, barium chloride dihydrate,
The water that's part of the solid's crystal structure is called water of crystallization.
In the case of barium chloride dihydrate, you get
In other words, if you were to drive the water of crystallization off by heating the hydrate, you would be left with
The find the hydrate's percent composition of water in barium chloride dihydrate, use the mass of one mole of hydrate and of two moles of water.
Barium chloride dihydrate has a molar mass of
Since one mole of hydrate contains
This means that the percent composition of water is
#(color(red)(2) xx 18.015color(red)(cancel(color(black)("g"))))/(244.26color(red)(cancel(color(black)("g")))) xx 100 = color(green)(|bar(ul(color(white)(a/a)"14.751%"color(white)(a/a)|)))#
This means that you get
Here is a similar lab with analysis conducted using copper (II) sulfate.
Hope this helps!