Which of the following is a balanced equation for Copper (II) sulfate + aluminum -- aluminum sulfate+solid copper?
A. CuSO4(aq)+Al(s) -- Al2(SO4)3(aq)+Cu(s)
B. 3 CuSO4(aq)+2Al(s) --Al2(SO4)3(aq)+Cu(s)
C. 3 CuSO4(aw)+2Al(s) -- Al2(SO4)3(aq) +H(g)

Question

Which of the following is a balanced equation for Copper (II) sulfate + aluminum --> aluminum sulfate+solid copper?
A. CuSO4(aq)+Al(s) --> Al2(SO4)3(aq)+Cu(s)
B. 3 CuSO4(aq)+2Al(s) -->Al2(SO4)3(aq)+Cu(s)
C. 3 CuSO4(aw)+2Al(s) --> Al2(SO4)3(aq) +H(g)

anonymous · Answer

B:3 CuSO4(aq)+2Al(s) -->Al2(SO4)3(aq)+Cu(s)

The answer is B but it is not balanced in the question 

The balanced equation is 
$$3 CuSO _{4}(aq)+2Al(s) -->Al _{2}(SO4)_{3}(aq)+3Cu(s)$$