1. Two equations are written on the blackboard when Fiona and Bhairavi enter the lab.
1. 2Mg + O2-> 2MgO
2. MgO + C -> 2Mg + CO2
The girls remember that magnesium burns brightly in air and conduct the first reaction. They collect the white powder of MgO and add some graphite and thoroughly mix the substances. They do not find that there is any change that results in getting Mg back, nor any evidence of CO2emission! What can be the most reasonable conclusion they can make from this?
1 The second equation is wrong.
2 They added the wrong quantity of graphite.
3 Graphite should have been added to a solution of MgO.
4 Some condition for reaction 2 to take place was missing, (eg) heat
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Answer:
The second equation is wrong
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Answer:
The second equation is wrong.
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