for chemistry revision SPM

1. QUICK REVISION
• DRAW DIAGRAMS

2. Heat of displacement of metals
Reaction
equation Mg + CuCl2  MgCl2 + Cu
Observations
Diagram
Magnesium and copper(II)
chloride solution
Magnesium dissolves
Blue solution decolourise

3. Preparation of insoluble salt
Aim
equation AgNO3 + NaCl  AgCl + NaNO3
Observations
Diagram
To prepare silver chloride salt
White precipitate formed

4. Preparation of soluble salt using
acid and oxide metal
Aim
equation CuO + H2SO4  CuSO4 + H2O
Observations
Diagram
To prepare copper(II) sulphate
Copper(II) oxide dissolve
Blue solution formed
50 cm3
sulphuric acid
0.5 mol dm-3
Excess copper(II)
oxide powder

5. Heating of carbonate metal
Reaction
equation ZnCO3  ZnO + CO2
Observations
Diagram
Heating zinc carbonate
Residue is yellow(hot) and
white (cold)
Gas changed lime water chalky

6. To determine reactivity of metals with
oxygenReaction
equation 2Zn + O2  2ZnO
Observations
Diagram
Zinc with oxygen
Zinc burns to leave white
powder
Potassium
manganate(VII)
Glass wool
Metal
powder
Heat (1)Heat (2)

7. Ethanol  ethene
Catalyst
equation C2H5OH  C2H4 + H2O
Gas
ethene
water
Glass
wool
Soaked in
ethanol
Porcelain chips
Heat
Observations
Diagram
Hot porcelain chips
Gas collected decolourise
brown bromine water