Pratical 2P08 Preparation of soluble and insoluble salts

By Zhong Zhi (8) , Kenneth (16), Loh Jia Sheng (24) and Tan Ye Kai (32)

There are certain questions that we are not sure of, so there may be a few blanks

Part I
Procedure:
2)
Observations: copper sulfate crystals and water are formed
3)
Colour of filtrate: colourless
Colour of residue: blue
Name of filtrate: water
Name of residue: copper sulfate

1. CuO (s) + H2SO4 --> CuSO4 + H2O
2. Blue
3 (a)
Observations_________
Explanations________
(b)
Observations_________
Explanations________

Part II
Procedure
4.
Colour of filtrate: Blue
Colour of residue: White

Exercise
1.
Word equation: aqueous lead (II) nitrate + aqueous copper (II) sulfate --> Lead (II) sulfate
Chemical equation: ________________________-->_______________________
2.white precipitate is formed in a blue solution
3. lead (II) sulfate + sodiun sulfate or potassium sulfate