Question

What is the correct balanced equation for the following:

aluminum + copper(II) sulfite -> copper + aluminum sulfite
(A) 2A + 3CuSO2 -> Cu + Al(SO)2

(B) 2A1 + 3CuSO4 -> 3Cu +Al2(SO4)3

(C) Al + CuSO3 -> Cu + AISO3

(D) 2A1 + 3CuSO3 -> 3Cu + Al2(SO3)3​

Answer 1

Option (D). 2Al + 3CuSO3 —> 3Cu + Al2(SO3)3

Step-by-step explanation:

Let start with the following

Al + CuSO3 —> Cu + Al2(SO3)3

There are 3 atoms of SO3 on the right. And 1 on the left. So to balance it, put 3 in front of CuSO3 as shown below:

Al + 3CuSO3 —> Cu + Al2(SO3)3

Now we need to balance Cu on the right, since there are 3 atoms of Cu on the left. To do this, put 3 in front of Cu as shown below;

Al + 3CuSO3 —> 3Cu + Al2(SO3)3

There are 2 atoms of Al on the right and 1 atom on the left. It must be balanced by putting 2 in front of Al to bal the equation as shown below;

2Al + 3CuSO3 —> 3Cu + Al2(SO3)3