Find Missing Coefficients: Al2SO4 + KOH --> AlOH3 + K2SO4

[ProblemSets]

What are the missing coefficients for the equation below?

Al2(SO4)3 + KOH ---> Al(OH)3 + K2SO4



a.) 1,6,2,3
b.) 2,12,4,6
c.) 1,3,2,3
d.) 4,6,2,3


I think my problem is whether or not to keep the SO4 together, or break it apart to sulfur and oxygen?

 

[ProblemSets]

answer is A. i figured it out.

 

[cristo]

For counting purposes, keep the OH and SO4 together. Then look at the coefficients of the metal ions to help you balance the equation.