1. The Joy of Balancing Equations

2. What we already know… Coefficient 2CaCl 2 The 2 tells you that there are 2Ca and 4Cl CaCl 2 Subscript The little two tells you that there are 2 Cl. A + B = Not chemically bonded, so its not a compound! AB = This is a compound which is chemically bonded. NEVER ADD SUBSCRIPTS! So…Lets practice some more!

3. Helpful hints to be successful with Balancing Equations Remember to… Draw your line separating the reactants from the products. Make a list of the elements on each side. Attack the compounds first! Save the Elements for last. If you hit a Dead End remember to go back and double your coefficients. Try it! Double check your work so that it is equal on both sides of the equation.

4. Balancing Equations Warm up Git-R-Done! 1.H 2 + O 2 H 2 O 2. HgO Hg + O 2 3. CO 2 + H 2 O C 6 H 12 O 6 + O 2 4. Zn + HCl ZnCl 2 + H 2

5. Balancing Equations Warm up Answers 1.2H 2 + O 2 2H 2 O 2. 2HgO 2Hg + O 2 3. 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 4. Zn + 2HCl ZnCl 2 + H 2

6. Balancing Equations Classwork 5. SiCl 4 + H 2 O H 4 SiO 4 + HCl 6. Na + H 2 O NaOH + H 2 7. H 3 PO 4 H 4 P 2 O 7 + H 2 O *8. C 7 H 6 O 2 + O 2 CO 2 + H 2 O

7. Balancing Equations Classwork 5. SiCl 4 + 4H 2 O H 4 SiO 4 + 4HCl 6. 2Na + 2H 2 O 2NaOH + H 2 7. 2H 3 PO 4 H 4 P 2 O 7 + H 2 O 8. 2C 7 H 6 O 2 + 15O 2 14CO 2 + 6H 2 O

8. Balancing Equations Classwork 9. H 2 SO 4 + HI H 2 S + I 2 + H 2 O 10. Al + HCl AlCl 3 + H 2 11. PCl 5 + H 2 O HCl + H 3 PO 4

9. Balancing Equations Classwork Answers 9. H 2 SO 4 + 8HI H 2 S + 4I 2 + 4H 2 O 10. 2Al + 6HCl 2AlCl 3 + 3H 2 11. PCl 5 + 4H 2 O 5HCl + H 3 PO 4

10. Balancing Equations Homework 12. Mg + N 2 Mg 3 N 2 13. Fe + H 2 O Fe 3 O 4 + H 2 14. NaOH + Cl 2 NaCl + NaClO + H 2 O 15. N 2 + H 2 NH 3 16. C 3 H 6 + O 2 H 2 O + CO 2 17. N 2 + O 2 N 2 O

11. Balancing Equations Homework Answers 12. 3Mg + N 2 Mg 3 N 2 13. 3Fe + 4H 2 O Fe 3 O 4 + 4H 2 14. 2NaOH + Cl 2 NaCl + NaClO + H 2 O 15. N 2 + 3H 2 2NH 3 16. 2C 3 H 6 + 9O 2 6H 2 O + 6CO 2 17. 2N 2 + O 2 2N 2 O

12. Balancing Equations Warm up 18. Al + FeO Al 2 O 3 + Fe 19. Fe 2 O 3 + H 2 Fe + H 2 O 20. K 2 O + H 2 O KOH 21. H 2 O 2 H 2 O + O 2

13. Balancing Equations Warm up Answers 18. 2Al + 3FeO Al 2 O 3 + 3Fe 19. Fe 2 O 3 + 3H 2 2Fe + 3H 2 O 20. K 2 O + H 2 O 2KOH 21. 2H 2 O 2 2H 2 O + O 2

14. Balancing Equations Classwork 22. Al + O 2 Al 2 O 3 23. C 7 H 16 + O 2 CO 2 + H 2 O 24. Na 2 O 2 + H 2 O NaOH + O 2 25. SiO 2 + HF SiF 4 + H 2 O 26. N 2 + H 2 NH 3 27. KClO 3 KCl + O 2 28. H 3 AsO 4 As 2 O 5 + H 2 O

15. Balancing Equations Classwork Answers 22. 4Al + 3O 2 2Al 2 O 3 23. C 7 H 16 + 11O 2 7CO 2 + 8H 2 O 24. 2Na 2 O 2 + 2H 2 O 4NaOH + O 2 25. SiO 2 + 4HF SiF 4 + 2H 2 O 26. N 2 + 3H 2 2NH 3 27. 2KClO 3 2KCl + 3O 2 28. 2H 3 AsO 4 As 2 O 5 + 3H 2 O

16. Balancing Equations Homework 29. KClO 3 KClO 4 + KCl 30. P 4 O 10 + H 2 O H 3 PO 4 31. Na 2 CO 3 + HCl NaCl + H 2 O + CO 2 32. K + Br 2 KBr 33. P 4 + O 2 P 2 O 5 34. N 2 O 5 + H 2 O HNO 3 35. Fe 2 O 3 + CO Fe + CO 2

17. Balancing Equations Homework Answers 29. 4KClO 3 3KClO 4 + KCl 30. P 4 O 10 + 6H 2 O 4H 3 PO 4 31. Na 2 CO 3 + 2HCl 2NaCl + H 2 O + CO 2 32. 2K + Br 2 2KBr 33. P 4 + 5O 2 2P 2 O 5 34. N 2 O 5 + H 2 O 2HNO 3 35. Fe 2 O 3 + 3CO 2Fe + 3CO 2

18. Challenging Equations 36. H 3 BO 3 H 4 B 6 O 11 + H 2 O 37. H 2 S + Cl 2 S 8 + HCl 38. S 8 + O 2 SO 3 39. C 3 H 8 + O 2 CO 2 + H 2 O 40. FeS 2 + O 2 Fe 2 O 3 + SO 2

19. Challenging Equations Answers 36. 6H 3 BO 3 H 4 B 6 O 11 + 7H 2 O 37. 8H 2 S + 8Cl 2 S 8 + 16HCl 38. S 8 + 12O 2 8SO 3 39. C 3 H 8 + 5O 2 3CO 2 + 4H 2 O 40. 4FeS 2 + 11O 2 2Fe 2 O 3 + 8SO 2

20. More Challenging Equations 41. C 2 H 6 + O 2 CO 2 + H 2 O 42. H 3 PO 4 + KOH K 3 PO 4 + H 2 O 43. CaCO 3 +H 3 PO 4 Ca 3 (PO 4 ) 2 +H 2 CO 3 44. Pb(OH) 4 +Cu 2 O PbO 2 +CuOH 45. Sn(NO 2 ) 4 +Pt 3 N 4 Sn 3 N 4 +Pt(NO 2 ) 4

21. More Challenging Equations Answers 41. 2C 2 H 6 +7O 2 4CO 2 + 6H 2 0 42. H 3 PO 4 + 3KOH K 3 PO 4 + 3H 2 O 43. 3CaCo 3 +2H 3 PO 4 Ca 3 (PO 4 ) 2 +3H 2 CO 3 44. Pb(OH) 4 +2Cu 2 O PbO 2 +4CuOH 45. 3Sn(NO 2 ) 4 +Pt 3 N 4 Sn 3 N 4 +3Pt(NO 2 ) 4

22. Vinegar Reacting With Baking Soda CH 3 COOH + NaHCO 3 H 2 O + NaOCOCH 3 + CO 2