Answer to Question #191119 in General Chemistry for Elisa Giuliani

Question

1. Solutions of iron (lll) chloride, FeCl3, are used in photoengraving and to make ink. This compound can be made be the following reaction:

2F + 3Cl2 -> 2FeCl3

a. How many grams of Fe are needed to combine with 4.5 moles of Cl2?

b. If 240 g of Fe is to be used in this reaction, with adequate Cl2, how many moles of FeCl3 will be produced?

Answer 1

a) V(Fe)=2/3*V(Cl2)=4.5mol*2/3=3mol

M(Fe)=56g/mol

m(Fe)=3mol*56g/mol=168g

b) V(Fe)=240g/56g/mol=4.29mol

V(Fe)=V(FeCl3)=4.29mol