Question

question 4 10 pts if the following reaction is balanced correctly cucl₂ + na₂co₃ → cuco₃ + nacl, the coefficient in front of nacl is _______. 4 1 2 3

Explanation:

Step1: Count sodium atoms on left - hand side

On the left - hand side of the reaction $CuCl_2+Na_2CO_3
ightarrow CuCO_3 + NaCl$, in $Na_2CO_3$, there are 2 sodium ($Na$) atoms.

Step2: Balance sodium atoms

To balance the sodium atoms on the right - hand side, since in $NaCl$ there is 1 sodium atom per formula unit, we need 2 moles of $NaCl$ to have 2 sodium atoms. So the balanced reaction is $CuCl_2+Na_2CO_3
ightarrow CuCO_3 + 2NaCl$.

Answer:

C. 2