ch9 mgo stoch lab
MAGNESIUM OXIDE STOICHIOMETRY LAB NAME____________
PURPOSE: Calculate % yield of MgO
PROCEDURE: Magnesium is placed in a crucible an heated as before
DATA:
Crucible mass ___________
Mg and crucible mass _______
MgO and crucible mass __________
CALCULATIONS AND CONCLUSIONS:
Actual yield MgO (data)_________
Balanced chemical equation with states _______________________________________
Theoretical yield of MgO (start with Mg) :___________
*Stoichiometry work:
Percent yield MgO _____
*formula and work:
Ways to improve % yield:___________________________________________________
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the white smoke is _______
The limiting reactant is ___________ and the excess reactant is ______________, and the evidence is ___________________________________________________________
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The molar mass of Magnesium oxide is __________________
Problems with other reactions:
1. What mass of water would theoretically result from the combustion of 90g of C2H6? ____
Chemical equation______________________________________________________
*Stoichiometry work:
If 150g of water is actually produced in the reaction, what is the % yield:?
work:
2. A gallon of gasoline(octane -C8H18) weighs about 6 pounds. Use Stochiometry to calculate how many pounds of carbon dioxide you theoretically put in the atmosphere when you burn a tankful (20 gallons) in your car. (Hint: 1 pound is about 454grams)
show work:
3. record answers on this form