What mass of pcl5 will be produced from the given masses of 26.0 g of p4 and 50.0 g of cl2?

PCl₅ mass = 58.73 g

The reaction equation is the chemical formula of reactants and products

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reactants and products

Reaction

P₄ + 10 Cl₂ → 4 PCl₅

We look for moles of each reactant so we can determine the limiting of the reactants

mass 26.0 g

molar mass: 123.9

mole = mass : molar mass

mole = 26 : 123.9

mole: 0.2114

mass 50 g

molar mass: 71

mole = mass : molar mass

mole = 50 : 71

mole: 0.7042

From the coefficient of the equation above, it shows that the ratio of mol P₄: mol Cl₂ = 1:10

A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients, and small or exhausted reactans become a limiting reactants

ratio P₄: 0.2114: 1  = 0.2114

ratio Cl₂: 0.7042: 10 = 0.07042

Because Cl₂ ratio smaller then Cl₂ becomes the limiting  reactants

So mole PCl₅ is based on mole Cl₂

From the coefficient of reaction: mol PCl₅: mol Cl₂ = 4: 10

then mole PCl₅ = 4/10 x 0.7042 = 0.28168

molar mass PCl₅= 208.5

mass PCl₅ = mole x molar mass

PCl₅ mass = 0.28168 x 208.5

PCl₅ mass = 58.73 g

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