Which two elements are not balanced in this equation? #Na_2S + ZnCl_2 -> NaCl + ZnS#

1 Answer
May 6, 2017

Answer:

The sodium and the chlorine atoms..........

Explanation:

#"Stoichiometry"# requires (i) that mass be balanced, and (ii) that charge be balanced........

We can put a check mark next to #(ii)#, but clearly for #(i)# there are 2 natrium reactants, and 1 natrium product, and 2 chlorine reactants, and 1 chlorine products:

And thus the stoichiometric equation is...........:

#Na_2S(aq) + ZnCl_2(aq) rarr ZnS(s)darr + 2NaCl(aq)#.

Are charge and mass balanced here? Don't trust my 'rithmetic!