Question

1. in the chemical reaction below, what are the correct coefficients? cu(s) + -- choose the correct answer -- ▾ agno₃(aq) → cu(no₃)₂(aq) + -- choose the correct answer -- ▾ ag(s) clear all

Explanation:

Step1: Balance Cu atoms

On the left, we have 1 Cu atom. On the right, in $\text{Cu(NO}_3\text{)}_2$, we also have 1 Cu atom. So Cu is balanced for now.

Step2: Balance $NO_3^-$ ions

On the right, in $\text{Cu(NO}_3\text{)}_2$, there are 2 $NO_3^-$ ions. So we need 2 $AgNO_3$ on the left to balance the $NO_3^-$ ions. So the coefficient for $AgNO_3$ is 2.

Step3: Balance Ag atoms

Now, with 2 $AgNO_3$ on the left, we have 2 Ag atoms on the left (from $AgNO_3$). So we need 2 Ag atoms on the right. Thus, the coefficient for Ag is 2.

Step4: Check the balanced equation

The balanced equation is: $\text{Cu(s)} + 2\text{AgNO}_3\text{(aq)}
ightarrow \text{Cu(NO}_3\text{)}_2\text{(aq)} + 2\text{Ag(s)}$

Answer:

The coefficient for $AgNO_3$ is 2 and the coefficient for $Ag$ is 2. So the blanks should be filled with 2 (for $AgNO_3$) and 2 (for $Ag$) respectively.