1. Balancing Chemical Equations Worksheet Answers Check these answers against the work you did on the six problems

2. Notes on the problems #’s 1, 2 & 4 are very similar to the problems we did in class. #3 should look very familiar and you should make yourself familiar with it (hint, hint) #5 is easy-peasy #6 will stretch your ability. Begin with the big compound on the reactants side – 7 and 1 just won’t work…think one step up

3. 1. H 2 + O 2  H 2 O H 2 + O 2  H 2 O H 2 + O 2  2H 2 O 2H 2 + O 2  2H 2 O Reactants Products H 2 O 2 O 1 Reactants Products H 2 H 4 O 2 Reactants Products H 4 O 2

4. 2. HgO  Hg + O 2 HgO  Hg + O 2 2HgO  Hg + O 2 2HgO  2Hg + O 2 Reactants Products Hg 1 O 1 O 2 Reactants Products Hg 2 Hg 1 O 2 Reactants Products Hg 2 O 2

5. 3. CO 2 + H 2 O  C 6 H 12 O 6 + O 2 CO 2 + H 2 O  C 6 H 12 O 6 + O 2 CO 2 + 6H 2 O  C 6 H 12 O 6 + O 2 6CO 2 + 6H 2 O  C 6 H 12 O 6 + O 2 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 Reactants Products C 1 C 6 H 2 H 12 O 3 O 8 Reactants Products C 1 C 6 H 12 O 8 Reactants Products C 6 H 12 O 18 O 8 Reactants Products C 6 H 12 O 18

6. 4. Na + H 2 O  NaOH + H 2 Na + H 2 O  NaOH + H 2 Na + 2H 2 O  NaOH + H 2 Na + 2H 2 O  2NaOH + H 2 2Na + 2H 2 O  2NaOH + H 2 Reactants Products Na 1 H 2 H 3 O 1 Reactants Products Na 1 H 4 H 3 O 2 O 1 Reactants Products Na 1 Na 2 H 4 O 2 Reactants Products Na 2 H 4 O 2

7. 5. H 3 PO 4  H 4 P 2 O 7 + H 2 O H 3 PO 4  H 4 P 2 O 7 + H 2 O 2H 3 PO 4  H 4 P 2 O 7 + H 2 O Reactants Products H 3 H 6 P 1 P 2 O 4 O 8 Reactants Products H 6 P 2 O 8

8. 6. C 7 H 6 O 2  CO 2 + H 2 O C 7 H 6 O 2 + O 2  CO 2 + H 2 O 2C 7 H 6 O 2 + O 2  CO 2 + H 2 O 2C 7 H 6 O 2 + O 2  14CO 2 + H 2 O 2C 7 H 6 O 2 + O 2  14CO 2 + 6H 2 O 2C 7 H 6 O 2 + 15O 2  14CO 2 + 6H 2 O Reactants Products C 7 C 1 H 6 H 2 O 4 O 3 Reactants Products C 14 C 1 H 12 H 2 O 6 O 3 Reactants Products C 14 H 12 H 2 O 6 O 29 Reactants Products C 14 H 12 O 6 O 34 Reactants Products C 14 H 12 O 34