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The Joy of Balancing Equations. What we already know… Coefficient 2CaCl 2 The 2 tells you that there are 2Ca and 4Cl CaCl 2 Subscript The little two tells.

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Presentation on theme: "The Joy of Balancing Equations. What we already know… Coefficient 2CaCl 2 The 2 tells you that there are 2Ca and 4Cl CaCl 2 Subscript The little two tells."— Presentation transcript:

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 CO 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 H 3 PO 4 H 4 P 2 O 7 + H 2 O 8. 2C 7 H 6 O O 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 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 PCl 5 + 4H 2 O 5HCl + H 3 PO 4

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

11 Balancing Equations Homework Answers 12. 3Mg + N 2 Mg 3 N Fe + 4H 2 O Fe 3 O 4 + 4H NaOH + Cl 2 NaCl + NaClO + H 2 O 15. N 2 + 3H 2 2NH C 3 H 6 + 9O 2 6H 2 O + 6CO N 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 C 7 H 16 + O 2 CO 2 + H 2 O 24. Na 2 O 2 + H 2 O NaOH + O SiO 2 + HF SiF 4 + H 2 O 26. N 2 + H 2 NH KClO 3 KCl + O H 3 AsO 4 As 2 O 5 + H 2 O

15 Balancing Equations Classwork Answers 22. 4Al + 3O 2 2Al 2 O C 7 H O 2 7CO 2 + 8H 2 O 24. 2Na 2 O 2 + 2H 2 O 4NaOH + O SiO 2 + 4HF SiF 4 + 2H 2 O 26. N 2 + 3H 2 2NH KClO 3 2KCl + 3O H 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 Na 2 CO 3 + HCl NaCl + H 2 O + CO K + Br 2 KBr 33. P 4 + O 2 P 2 O N 2 O 5 + H 2 O HNO Fe 2 O 3 + CO Fe + CO 2

17 Balancing Equations Homework Answers 29. 4KClO 3 3KClO 4 + KCl 30. P 4 O H 2 O 4H 3 PO Na 2 CO 3 + 2HCl 2NaCl + H 2 O + CO K + Br 2 2KBr 33. P 4 + 5O 2 2P 2 O N 2 O 5 + H 2 O 2HNO 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 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 H 2 O 37. 8H 2 S + 8Cl 2 S HCl 38. S O 2 8SO C 3 H 8 + 5O 2 3CO 2 + 4H 2 O 40. 4FeS O 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 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 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 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


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