MgO Lab: How would your calculated value for the percent composition of magnesium oxide been affected if all the magnesium in the crucible had not reacted?
Calculation:
#% Mg = (m_(Mg))/m_(MgO)# x 100%
Will the %Mg be over-reported? Under-reported?
Calculation:
Will the %Mg be over-reported? Under-reported?
1 Answer
Jul 30, 2017
Would it not be under-reported?
Explanation:
Look at your quotient.......
Incomplete reaction DETRACTS from the denominator, and reduces the measured mass of magnesium oxide...., i.e. we measure
Since magnesium oxidizes fairly fiercely, this circumstance is unlikely to occur.....of course, given the reaction some mass loss of the magnesium oxide ash could occur.
Here is a short video which summarizes this experiment.
