Answer:
CuS(s) + 2HCl(aq) —> CuCl2(aq) + H2S(g)
Explanation:
CuS(s) + HCl(aq) —> CuCl2(aq) + H2S(g)
The above equation can be balance by by doing the following:
CuS(s) + HCl(aq) —> CuCl2(aq) + H2S(g)
There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:
CuS(s) + 2HCl(aq) —> CuCl2(aq) + H2S(g)
Now the equation is balanced since the number of atoms present in the elements are the same on both side of the equation i.e
Reactant:
Cu = 1
S = 1
H = 2
Cl = 2
Product:
Cu = 1
S = 1
H = 2
Cl = 2
Therefore, the balanced equation is:
CuS(s) + 2HCl(aq) —> CuCl2(aq) + H2S(g)
