Calculate the density of Aluminium Bronze (4% Fe, 11% Al, rest is Copper).Thanks
aluminium is a metal... it has a valency of 3.. it has got all the props that a metal has for eg : lusturous, good conductor of heat and electricity..etc etc.... it is highly electropositive metal. it has emptyd orbitals and thus can borrow electrons and attain a stable confugeration... as its compounds are elctron deficient..! its compounds such as AlCl3 etc act as a lewis acid..the hybridisation state of Al is sp3d2... aluminium forms a thin protective oxide layer which prevents its further corrossion.. and this is also the reason y they do not react with weak acids.. Al is amphoteric(it reacts with acids as well as base) Al reacts with halogen to form trihalides... Al's covalency can be expected beyond 4 due to the presence of empty d orbitals...
Assume you're making 100g of aluminum bronze. You would need 4g Fe, 11g Al and 85g Cu. Volume = mass/density Density of Fe = 7.874 g/cm^3 Therefore volume of Fe required = 4/7.874 = 0.51 cm^3 Density of Al = 2.7 g/cm^3 Volume of Al required = 11/2.7 = 4.07cm^3 Density of Cu = 8.02 g/cm^3 Volume of Cu required = 85/8.02 = 10.6cm^3 Total volume of 100 g of aluminum bronze = (0.51 + 4.07 + 10.6) cm^3 = 15.18 cm^3 Density of aluminum bronze = mass/volume = 100g / 15.18cm^3 = 6.59 g/cm^3
