Question

In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate in which heat is evolved and an unreactive gas is produced.

What is the equation for this reaction?

A. 2Al + Ba(NO3)2 -> Al2O3 + BaO + 2NO
B. 4Al + 4Ba(NO3)2 -> 2Al2O3 + 4 Ba(NO2)2 + O2
C. 10Al + 3 Ba(NO3)2 -> 5Al2O3 + 3BaO + 3N2
D. 10Al + 18Ba(NO3)2 -> 10Al(NO3)3 +18BaO +3N2

Answer 1

Answer: The correct answer is Option 3.

Step-by-step explanation:

When aluminium in solid state reacts with powdered barium nitrate, it results in the formation of number of products.

The chemical reaction between aluminium and barium nitrate follows the equation:

`10Al+3Ba(NO_3)_2\rightarrow 5Al_2O_3+3BaO+3N_2`

By Stoichiometry of the reaction:

10 moles of aluminium reacts with 3 moles of barium nitrate to produce 5 moles of aluminium oxide, 3 moles of barium oxide and 3 moles of nitrogen gas.

Nitrogen gas evolved is the unreactive gas.

Hence, the correct answer is Option 3.

Answer 2

I think the correct answer from the choices listed above is option A. The correct equation would be:

2Al + 3Ba(NO3)2 -> Al2O3 + 3BaO + 6NO2

The products would be aluminum nitrate, barium oxide and nitrogen dioxide.