The reaction between aluminium and ferric oxide can generate temperatures up to 3273 K and is used in welding metals. (Atomic mass of Al = 27 u Atomic mass of 0 = 16 u) 2Al + Fe_(2)O_(3) to Al_(2)O_(3)+ 2Fe, If, in this process, 324 g of aluminium is allowed to react with 1.12 kg of ferric oxide. (i) Calculate the mass of Al_(2)O_(3) formed. (ii) How much of the excess reagent is left at the end of the reaction?

The reaction between aluminium and ferric oxide can generate temperatu

1.	The reaction between aluminium and ferric oxide can generate temperatures up to 3273 K and is used in welding metals. (Atomic mass of Al = 27 u Atomic mass of 0 = 16 u) 2Al + Fe_(2)O_(3) to Al_(2)O_(3)+ 2Fe, If, in this process, 324 g of aluminium is allowed to react with 1.12 kg of ferric oxide. (i) Calculate the mass of Al_(2)O_(3) formed. (ii) How much of the excess reagent is left at the end of the reaction?
Answer» SOLUTION :Given : `2Al+Fe_(2)O_(3)rarrAl_(2)O_(3)+2F_(e)` Molar mass of `Al_(2)O_(3)` formed `=6molxx102gmol^(-1)` `{:[(Al_(2)O_(3)),((2xx27)+(3xx16)),(54+48=102):}]=612g` Excess reagent `=Fe_(2)O_(3)` Amount of excess reagent LEFT at the end of the reaction `=1molxx160mol^(-1)` `=160g{:[(Fe_(2)O_(3)),((2xx56)+(3xx16)),(112+48=160):}]=160g`