2P08 Preparation of Soluble and Insoluble Salts

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

Name of residue: Lead(II)Sulfate

Exercise
1. Word equation: Copper sulfate + lead nitrate = Copper nitrate + Lead sulfate
Chemical equation: CuSO4 (aq) + Pb(NO3)2 (aq) = Cu(NO3)2 (aq) + PbSO4 (s)
2.White precipitate forms when the two aqueous solutions react.
3. Alternatives for lead (||) sulfate

Lead 2 nitrate + Sodum sulfate

Lead 2 sulfide + Hydrogen peroxide

Done by : Ambrose Chua, Kendrick Sinatra Hardy, Liu Yu Xuan, Jovian Tan

Practical 2P04 by Darryl Hwang(10) Jason Lee (18) Mark Soh (26) Zhu ZeHao (34)

	Magnesium	Iron	Zinc	Copper
Oberservation when metal is added to acid	Air bubbles formed “Pop” sound Heat produced	Air bubbles formed “Pop” sound Heat produced	Air bubbles formed “Pop” sound Heat produced	Nothing changed
Effect of gas on burning splint	Fire went off	Fire went off	Fire went off
Effect on damp RED litmus paper	Remained the same	Remained the same	Remained the same
Effect on damp BLUE litmus paper	Remained the same	Red	Remained the same
Name of Gas formed	Hydrogen	gas
Chemical formula for gas	H2

Conclusion

1. salt and hydrogen gas

2.dilute acid + metal -> salt + hydrogen gas

3. We can use a glowing splint and calcium hydroxide to test for oxygen and carbon dioxide respectively.

4.It is neutral

5.Magnesium, iron, copper, zinc

Exercise

1a. magnesium chloride + hydrogen gas

b. Mg + HCl -> MgCl + H

2a. Iron(II) chloride + hydrogen gas

b. Fe + HCl -> ZnCl + H

3a. Zinc chloride + hydrogen gas

b. Zn + HCl -> ZnCl + H

4a. Magnesium sulfate + Hydrogen gas

b. Mg + H2SO4 -> MgSO4 + 2H

5a. Iron sulfate + hydrogen gas

b. Fe + H2SO4 -> FeSO4 + 2H

6a. Zinc sulfur + hydrogen gas

b. Zn + H2SO4 -> ZnSO4 + 2H

7a. Magnesium nitrate + hydrogen gas

b. Mg + 2H2NO3 -> Mg(NO3)2+4H

8a.Iron nitrate + hydrogen gas

b. Fe+H2NO3-> FeNO3 + 2H

9a.Zinc nitrate + hydrogen gas

b.Zn + H2NO3 -> ZnNO3 + 2H