How do you balance SO2+O2+H2O=H2SO4?

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marfre Share
Mar 5, 2017

Answer:

#2SO_2 + O_2 + 2H_2O -> 2H_2SO_4#

Explanation:

Start with the skeleton equation:
#SO_2 + O_2 + H_2O -> H_2SO_4#

Atoms on the left: #1-S, 5-O, 2-H#
Atoms on the right: #1-S, 4-O, 2-H#

To make the number of oxygen on the left to be even, add #2# molecules to #H_2O# and a #2# to the right.

#SO_2 + O_2 + 2H_2O -> 2H_2SO_4#

Atoms on the left: #1-S, 6-O, 4-H#
Atoms on the right: #2-S, 8-O, 4-H#

To make the number of #S# to be the same, add #2# molecules to the #SO_2# on the left:

#2SO_2 + O_2 + 2H_2O -> 2H_2SO_4#

Atoms on the left: #2-S, 8-O, 4-H#
Atoms on the right: #2-S, 8-O, 4-H#

Balanced!

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