Asked by allison

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure. Its formula can be written as Na2CO3·x H2O, where x is the number of moles of H2O per mole of Na2CO3. When a 2.228 g sample of washing soda is heated at 125°C, all the water of hydration is lost, leaving 0.825 g of Na2CO3. What is the value of x?
Answered by DrBob222
mass water expelled is
2.228-0.825 = ?, then
mols H2O = ?g/18 = ?
0.825/molar mass Na2CO3 = ?
Now find the ratio of the two. This USUALLY is done to make Na2CO3 = 1.00 and x some whole number.
Answered by Anonymous
179.87
Answered by Anonymous
.009
Answered by Anonymous
128.5
Answered by Anonymous
the correct answer is 10 for anyone that comes here
just got it right on webassign