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SPS2d. Demonstrate the Law of Conservation of Matter in a chemical reaction. SPS2e. Apply the Law of Conservation of Matter by balancing the following types of chemical equations: Decomposition Synthesis Single Replacement Double Replacement. Mentos Video.
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SPS2d. Demonstrate the Law of Conservation of Matter in a chemical reaction.SPS2e. Apply the Law of Conservation of Matter by balancing the following types of chemical equations:DecompositionSynthesisSingle ReplacementDouble Replacement
Mentos Video • http://www.youtube.com/watch?v=hKoB0MHVBvM
Chemical Reaction The recombination of atoms in one substance to form a new substance VIDEO
Evidence of a chemical reaction: • Gas is released • Temperature change Exothermic – heat released Endothermic – heat is absorbed • Color change • Precipitate is formed
RE-CALL what you remember from earlier this year. Evidence of a Chemical Reaction Precipitate is Formed Gas is Released Temperature Change Color Change
3 parts of chemical reaction: YEILD REACTANTS PRODUCT FLASH CARD and Three Different Colored Markers
HOMEWORK – Due Wednesday • Finish the worksheet on labeling the parts of a reaction. • Products • Reactants • Yeild QUIZ WEDNESDAY! Over this topic…..
Get Clickers! • Clear off desks
Quiz A = Products B= Reactants • Enter 1 to 5 • 6. Sodium nitrate • 7. Silver Nitrate • 8. Sodium Chloride • 9. Silver chloride • 10. Zinc Sulfate • 11. Zinc • 12. Iron • 13. Iron Sulfate
SPS2d. Demonstrate the Law ofConservation of Matter in a chemical reactionEQ: How does the Law of Conservation of Matter apply to balancing equations?
Color Code Parts of Equation3 colors 3H2O 3 = Coefficient (can change) HO = Elements 2 = Subscript (can NOT change)
Chemical Equation • Short hand way to describe a chemical reaction • Uses chemical symbols and numbers to show the reaction
Examples: Na + Cl --> NaCl 2NaCl + 2H2SO4 + MnO2--> Na2SO4 + MnSO4 + 2H2O + Cl2 NaCl + H2O <--> H2O + Na+1 + Cl-1
Parts of a Chemical Equation • Reactants – to the left of arrow • Products – to the right of arrow • Yield – is the arrow • (s) - solid • (l) - liquid • (g) - gas • (aq) – aqueous solution, reacts with H20
TOD • WRITING CHEMICAL EQUATIONS • Complete BOTH sides of the worksheet • REMINDER • QUIZ tomorrow on labeling all the parts of a chemical equation Oxygen +
Activator • The parts of a chemical reaction QUIZ. • Clear off desk • Keep out PEN or PENCIL only
Can you figure out the total numberof each element? • (NH4)2so4
3CaCl2 • Put a star next to the subscript • Circle the coefficient • Subscript • Multiplies only the atom it is attached to • Coefficient • Multipiles everything after it
Pointers for balancing equations: • Never change subscripts when balancing equations • Always double check – changing one may change something you thought was already balanced http://education.jlab.org/elementbalancing/cookie_error.html
Balancing Chemical Equations: • Law of Conservation • Must have same kinds/numbers of atoms on both sides of the equation
Are these balanced? If NOT Balance them….. H2 + O2 H2O (NH4)2CO3 ---> NH3 + CO2 + H2O
NaCl is a compound and happily married ….Coefficient goes in FRONT not between, effecting both! Na + Cl are two different elements NOT happily married ….. Coefficient goes in front of either or both only, the PLUS sign separates them. Reminder
IN GET OUT SOME PAPER….TO BE SUCCESFUL YOU MUST BE ORGANIZED AND MAKE A CHART TO DOUBLE CHECK YOUR WORK!
Num. 1 N2 + H2 NH3
Num. 2 KClO3 KCl + O2
Num. 5 Pb(OH)2 + HCl H2O + PbCl2
Num. 6 AlBr3 + K2SO4 KBr + Al2(SO4)3
TOD 2. H2 + O2 ----> H2O 1. Cu + O2 ----> Cu2O 3. Mg + P4 ---> Mg3P2 4. H2SO4 + NaOH ----> H2O + Na2SO4 5. CaCl2 + AgNO3 ----> AgCl + Ca(NO3)2 Don’t forget WOD tomorrow!
http://video.about.com/chemistry/How-to-Balance-Chemistry-Equations.htmhttp://video.about.com/chemistry/How-to-Balance-Chemistry-Equations.htm • How does the Law of Conservation of Mass/Matter apply to balancing chemical equations?
PRACTICE • 10. • 15.
QUIZ Time! • Complete 1 to 10
Have Your Homework OutWith Your Name Ready To Turn In • Achieve3000 • BURNING WOOD: BAD FOR THE PLANET • Complete: • All Summaries • Activity • Thought Question
Think about this! • What happens to the amount of matter in this reaction?
Law of Conservation of Matter • States that matter can not be created or destroyed. • What you start with in a reaction is still the same after the reaction just redistributed
CH3COOH + NaHCO3 -> H2O + NaOCOCH3 + CO2 LAB TIME! http://www.youtube.com/watch?v=5o-UjU8l_3M&feature=related
GET CLICKERS! • ANYONE NEED TO TURN IN HOMEWORK…..Have it out. • PROGRESS REPORTS due Friday.
4 Types of Chemical Reactions • Synthesis • Decomposition • Single Replacement • Double Replacement
Synthesis • Simple compounds put together to make complex ones • A + B AB • 2H2 + O2 2H2O