Question

given the unbalanced equation: al + cuso₄ → al₂(so₄)₃ + cu. when properly balanced, the sum of the balancing coefficients is
6.
7.
8.
9.
question 8
6 pts
given the unbalanced equation: h₂o₂ → h₂o + o₂. when properly balanced, the sum of the balancing coefficients is
4.
5.
6.
7.

Explanation:

Step1: Balance the first equation

Balance $Al + CuSO_{4}
ightarrow Al_{2}(SO_{4})_{3}+Cu$. For sulfate - ions balance, put 3 in front of $CuSO_{4}$. Then for $Al$ balance, put 2 in front of $Al$. The balanced equation is $2Al + 3CuSO_{4}=Al_{2}(SO_{4})_{3}+3Cu$. The sum of coefficients is $2 + 3+1 + 3=9$.

Step2: Balance the second equation

Balance $H_{2}O_{2}
ightarrow H_{2}O + O_{2}$. Put 2 in front of $H_{2}O_{2}$ and 2 in front of $H_{2}O$. The balanced equation is $2H_{2}O_{2}=2H_{2}O+O_{2}$. The sum of coefficients is $2 + 2+1 = 5$.

Answer:

Question 1: 9
Question 2: 5