Answer to Question #120225 in General Chemistry for Asher David

Question

water was added to 90g of a salt xcl2 to produce 40cm3 of a saturated solution at 25 o C . the solubility of the salt at 25 o C is 8 mol dm-3. if the atomic mass is 29 calculate the mass of the undissolved salt

Answer 1

Solubility=8mol/10cm³=0.8mol/cm³

Yeild=40cm³

Then the mass that dissolved is

$Mass= moles * rfm$

Mass=0.8*29= 23.2g

The mass that did not dissolve becomes ; 90-23.2=66.8g