Question

What are the missing coefficients for the skeleton equation below?
Cr(s) + Fe(NO3)2(aq) ⟶ Fe(s) + Cr(NO3)3(aq)

Answer 1

Answer:

1. 2Cr(s)+ 3Fe(NO3)(aq)_ 3Fe(s)+2Cr(NO3)3(aq)

Answer 2

The missing coefficients for the skeleton equation are calculated below.

• Cr(s) + Fe(NO3)2(aq) ⟶ Fe(s) + Cr(NO3)3(aq) is an unbalanced equation because a number of atoms of the same element on the left-hand side are not equal to a number of atoms on the right-hand side.
• The coefficient of Fe(NO3)2 will be 3/2 because after multiplying by 3/2 there will be 3 nitrogen on both the sides and 9 oxygens on both the sides.
• Similarly, multiplying by 3/2 with Fe(s). so, that Fe becomes equal on both sides.
• Now, it is a balanced equation.
• Cr(s) + 3/2Fe(NO3)2(aq) ⟶ 3/2Fe(s) + Cr(NO3)3(aq).

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