Question

Balance the following redox reaction. When this equation is properly balanced, using the smallest whole-number coefficients, what are the coefficients on each substance?


Al(s) + Cu2+(aq) → Al3+(aq) + Cu(s) unbalanced


A.
2,6,3,6

B.
2,3,2,3

C.
3,3,2,2

D.
3,2,3,2

E.
1,6,1,6

Answer 1

Answer on Question #69149 - Chemistry – Other

Task:

Balance the following redox reaction. When this equation is properly balanced, using the smallest whole number coefficients, what are the coefficients on each substance?

$$Al(s) + Cu^{2+}(aq) = Al^{3+}(ag) + Cu(s).$$

Solution:

The reaction equation:

$$Al + Cu^{2+} = Al^{3+} + Cu;$$ $$Al^0 - 3e = Al^{3+};$$ $$Cu^{2+} + 2e = Cu^0\ | ;$$ $$2Al + 3Cu^{2+} = 2Al^{3+} + 3Cu;$$

2,3,2,3

$Cu^{2+}$ – oxidizing agent;

$Al$ – reducing agent;

Answer: B. 2,3,2,3.

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