Finding the number of water molecules in a hydrated salt

Question 1

Step 1

Answer 1

Find mass of hydrated salt
And mass of anhydrous salt

Question 2

How to find mass of water in the hydrated salt?

Answer 2

Mass of hydrated salt - mass of anhydrous salt

Question 3

Step 2

Answer 3

Find moles of water on the hydrated solid by doing mass of water/Mr of water (18)

Question 4

Step 3

Answer 4

Find moles of anhydrous solid doing mass of anhydrous solid/ Mr of anhydrous solid

Question 5

Final step

Answer 5

Moles of water/ moles of anhydrous solid
= x value