
Concept explainers
Interpretation :
While balancing a
Concept Introduction :
Balancing a chemical reaction means keeping equal number of each atoms in both the sides.

Answer to Problem 5RQ
While balancing a chemical reaction one should start with the main reactant in which maximum types of different atoms are there.
The balanced equation is given below.
Explanation of Solution
In this example ethyl alcohol (C2H5OH) is the starting material which is undergoing combustion reaction with oxygen. Ethanol contains all the types of atoms which are C, H and O.
To make the C and H equal in both the sides, 2 moles of CO2 and 3 moles of H2O are added in the right side. Finally to balance oxygen 3 moles O2 is added in the left side.
Chapter 7 Solutions
World of Chemistry, 3rd edition
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