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Synthesis of Magnesium Oxide

Terms in this set (12)

What should be done to the magnesium ribbon before heating to obtain more accurate result?
Clean the magnesium ribbon with sand paper
What does cleaning the Mg do?
Removes the magnesium oxide layer on the ribbon
Why should the crucible be covered with its lid when the magnesium starts to burn?
To prevent the white fume of magnesium oxide from escaping into the air
Why should the lid be lifted at intervals during the combustion of magnesium?
To let oxygen in the air enter the crucible to react with magnesium
Explain how do you ensure that the magnesium ribbon burns completely
Heating the crucible and its content until no further reaction is visible
Write a balanced equation for the combustion of magnesium with oxygen
2Mg (s) + O2 (g) -> 2MgO (s)
What are safety hazards for this experiment
Very hot crucible & brightly burning Mg
Give evidence of a Chemical reaction
Light/heat released, reactant used up, new product formed, mass gain
How does the product compare with the reactants?
MgO white powder, Mg Shiny metal, O2 colourless gas
How do you ensure strong heating
Heat the crucible with the tip of the blue flame
How can you identify the gas formed when Mg reacts with HCl?
Pop test to identify Hydrogen
How can you increase accuracy of this experiment
Ensure the Mg has fully reacted and try not to lose any MgO fumes
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