Determine the limiting reactant (i.e. the reactant that forms the least number of mass of the product):
Mass of PCl3 produced from P4:
Mass of PCl3 produced from Cl2:
The limiting reactant is Cl2, therefore it is used up completely in the reaction, and P4 is the excess reactant.
Elemental phosphorus reacts with chlorine gas according to the equation:
P4(s) + 6 Cl2(g) → 4 PCl3(l)
A reaction mixture initially contains 45.53 g P4 and 131.1 g Cl2.
Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant remains?
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