Humboldt State University ® Department of Chemistry

Richard A. Paselk

	Introductory Chemistry	Fall 2005
Exercise: Balancing by Inspection	© R. Paselk 2005
	Worked Examples
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Equation Balancing by Inspection

Balance the equations below by providing the proper coefficients:

1. Al_(s) + Fe₂O_{3 (s)} Fe_(s) + Al ₂O_{3 (s)}

2. KClO_{3 (s)} + heat KCl_(s) + O_{2 (g)}

3. C₄H_{10 (g)} + O_{2 (g)} CO_{2 (g)} + H₂O_(g)

4. N_{2 (g)} + H_{2 (g)} NH_{3 (g)}

5. P_{4 (s)}+ F _{2 (g)} PF_{5 (g)}

6. Cu_(s) + AgNO_{3 (aq)} Cu(NO₃)_{2 (aq)} + Ag_(s)

7. Fe_(s) + O_{2 (g)} Fe₂O_{3 (s)}

8. FeCl_{3 (s)} + H₂O_(l) HCl_(aq)+ Fe(OH)_{3 (s)}

9. Zn(NO₃)_{2 (s)} + heat ZnO_(s) + NO_{2 (g)} + O_{2 (g)}

10. H₃PO_{4 (l)} + heat H₂O_(l) + P₄O_{10 (s)}

Answers