Determination of formulae - 3.2 (3)

Question 1

What is hydrated?

Answer 1

many coloured crystals

Question 2

What is part of the coloured crystals’ crystalline structure?

Answer 2

water molecules

Question 3

What is this water known as?

Answer 3

water of crystallisation

Question 4

When blue crystals of hydrated copper sulfate are heated, what happens?

Answer 4

the bonds that hold the water within the crystal are broken and the water is driven off

Question 5

When the bonds are broken, what then happens?

Answer 5

this then become white anhydrous copper sulfate

Question 6

How is the water of crystallisation shown in the formula of hydrated copper sulfate?

Answer 6

with a large dot between the compound formula and the five water units

Question 7

What is the equation for when water is removed?

Answer 7

CuSOv4.5Hv2O (s) HYDRATED —> CuSOv4 (s) ANHYDROUS + 5Hv2O(l)