How do you balance the following chemical equations by adding coefficients?

HCI -> H_2O + NaCIHCIH2O+NaCI
Fe_2O_3 + C -> Fe+ CO_2Fe2O3+CFe+CO2
SO_2 + O_2 -> SO_3#

1 Answer
Apr 27, 2016

You do so stoichiometrically. Garbage out must equal garbage in.

Explanation:

HCl(aq) + NaOH(aq) rarr NaCl(aq) + H_2O(l)HCl(aq)+NaOH(aq)NaCl(aq)+H2O(l)
(I am guessing that this is the equation you mean.)

2Fe_2O_3(s) + 3C(s) rarr 4Fe(l) + 3CO_2(g)2Fe2O3(s)+3C(s)4Fe(l)+3CO2(g)
(This is the reaction that would take place in an iron foundry.)

SO_2(g) + 1/2O_2 rarr SO_3(g)SO2(g)+12O2SO3(g)
(You can double this equation if you dislike the fractional coefficient.)

Are all equations stoichiometrically balanced? If not, they should be.