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# Balancing Equations #1. 2014 (1)

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### Balancing Equations #1. 2014 (1)

1. 1. You Will Need: 1. Acids and Bases – Parts 1 & 2 – 4 pages 6 sides – Due NOW 2. Pencil, Periodic Table (pgs. 196-197) 4. Colored Pencils, Highlighters or Markers 5. Balancing Equations - 2 pages 4 sides (Bookshelf- Please Staple in the correct order)
2. 2. 1. Cumulative STAR cards test Tomorrow on 1-101 2. Pick up Atomic Structure Supplies by tomorrow 3. OFFICIAL STAR TESTING is on THURSDAY and FRIDAY of this week. Please bring something to do after you have finished the test.
3. 3. Balancing a chemical equations is much like the work of an accountant who has to show where every penny has come from and where it has gone to.
4. 4. Vocabulary Word Definition Inhibitors Catalysts Starts and/or Speeds Up Chemical Reactions Stops and/or Slows Down Chemical Reactions
5. 5. Conservation of Mass Reactants Products Coefficient Mass (particles) can neither be created or destroyed in any chemical reaction Word Definition
6. 6. 2 NaOH + H2SO4 Na2SO4 + 2 H2O Conservation of Mass = the same number of atoms of each element on each side of the equation.
7. 7. Conservation of Mass Reactants Products Coefficient Mass can neither be created or destroyed in any chemical reaction. Substances going into the reaction. Word Definition
8. 8. Reactants = the substances going into a reaction 2 NaOH + H2SO4 Na2SO4 + 2 H2O
9. 9. Conservation of Mass Reactants Products Coefficient Mass can neither be created or destroyed in any chemical reaction. Substances going into the reaction. Substances produced by the reaction Word Definition
10. 10. Products = the substances being produced by the reaction 2 NaOH + H2SO4 Na2SO4 + 2 H2O
11. 11. Conservation of Mass Reactants Products Coefficient Mass can neither be created or destroyed in any chemical reaction. Substances going into the reaction. Substances produced by the reaction The number in front of the formula indicating how many molecules Word Definition
12. 12. Coefficient = The number in front of each formula or element indicating how many molecules 2 NaOH + H2SO4 Na2SO4 + 2 H2O
13. 13. The Law of Conservation of Mass states that mass is neither created or destroyed in any chemical reaction. Therefore balancing of equations requires the same number of atoms on both sides of a chemical reaction.
14. 14. 1. Get Yourself an unbalanced equation. NaOH + H2SO4 Na2SO4 + H2O
15. 15. 1. Get Yourself an unbalanced equation. 2. Draw boxes around all the chemical formulas. NaOH + H2SO4 Na2SO4 + H2O
16. 16. 3. Make an element inventory. Element Before After Na=Sodium 1 2 O= Oxygen 5 5 H= Hydrogen 3 2 S= Sulfur 1 1 NaOH + H2SO4 Na2SO4 + H2O
17. 17. 4. Write the numbers in front of each of the boxes until the inventory for each element is the same both before and after the reaction. NaOH + H2SO4 Na2SO4 + H2O Element Before After Sodium 1 2 Oxygen 5 5 Hydrogen 3 2 Sulfur 1 1
18. 18. 4. Write the numbers in front of each of the boxes until the inventory for each element is the same both before and after the reaction. NaOH + H2SO4 Na2SO4 + H2O Element Before After Na 1 2 O 5 5 H 3 2 S 1 1 2 2 6 4
19. 19. 4. Write the numbers in front of each of the boxes until the inventory for each element is the same both before and after the reaction. NaOH + H2SO4 Na2SO4 + H2O Element Before After Na 2 2 O 6 5 H 4 2 S 1 1 2
20. 20. 4. Write the numbers in front of each of the boxes until the inventory for each element is the same both before and after the reaction. NaOH + H2SO4 Na2SO4 + H2O Element Before After Na 2 2 O 6 5 H 4 2 S 1 1 2 2 6 4
21. 21. •You have 11 problems to balance… Due by the end of the period on Monday •Ask questions when you don’t understand
22. 22. HOMEWORK: 1. Balancing Equations – Due by Friday 2. Cumulative STAR CARDS Test Tomorrow on all cards 3. OFFICIAL STAR TESTING is Thur & Fri.. 4. Pick up Atomic Structure Supplies from middle table by tomorrow.