Problem looks like this: The following questions refer to Al + O 2 a. If you sta

Question

Problem looks like this:

The following questions refer to Al + O2

a. If you start with 45g of Al and 60g of O2,How much product do you make?
b Is it an ionic or covalent compound?
c. Name the product
d. Predict if the product is liquid, gas or solid.


Thanks!

Explanation / Answer

4Al + 3O2 -> 2Al2O3 n(Al) = m/M = 45/26.98 = 1.67 n(O2) = m/M = 60/32 = 1.875 Stoichiometry ratio = n(Al)/n(O2) = 4/3 = 1.333 Actual ratio = 1.67/1.875 = 0.89 SR > AR Al is the limiting reagent (a) n(Al2O3) = 2/4 x n(Al) = 0.835mol m(Al2O3) = nM = 0.835 x 101.96 = 85.14g (b) It is an ionic compound since this is the bonding between Al andO (c) Aluminium oxide (d) Th product is solid Hope this helps!

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