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Chemical Equations and Balancing Reactions

Learn about chemical equations, balancing reactions, and evidence of chemical reactions in this informative Jeopardy-style game. Perfect for students studying chemistry!

francisrodriguez
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Chemical Equations and Balancing Reactions

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  1. Jeopardy Evidence of Chemical Reactions Chemical Equations Balancing Equations Potpourri Definitions $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 Final Jeopardy

  2. Define chemical equation. A representation of a chemical reaction using the formulas of the starting substances that react and the new substances that are formed 1 - $100

  3. 1 - $200 Read the statement. What is this the definition of? One or more substances are changed into one or more new substances by the reorganization of component atoms • Chemical Reaction

  4. 1 - $300 • What is a reactant? A product? Give an example. • A reactant is the substance that enters the equation, the product is written on the right side of the arrow in a chemical equation. • 2H2(reactant) + 02(reactant)> 2H2O(product)

  5. 1 - $400 • What is a coefficient? • The numbers used to balance chemical equations

  6. 1 - $500 Label all of the underlined parts of the equation. 2 NaOH(aq) + CaCl2(aq)  Ca(OH)2 + 2 NaCl(aq) (3) (3) ___________ ____________ (1) (2) What is the whole thing called? (4) • 1-Reactants • 2-Products • 3-coefficients • 4- A Chemical reaction

  7. 2 - $100 • Balance the following equation: NI2 +I2 > NI3 N2+3I2 2NI3

  8. 2 - $200 • Balance the equation __C8H18+__O2__ CO2+ __H2O • 2C8H18+ 25O2 16CO2+ 18H2O

  9. 2 - $300 • Balance the equation __FeCl3+ __NaOH __Fe(OH)3+ __NaCl • FeCl3+3NaOHFe(OH)3+3NaCl

  10. 2 - $400 • Balance the equation: Iron(III)nitrate in water solution reacts with potassium sulfide in water solution to form aqueous potassium nitrate and solid iron(III) sulfide. • 2Fe(NO3)3 + 3K2S 6KNO3+ Fe2S3

  11. 2 - $500 • Write the balanced equation for the reaction (include all states of matter)  C3H8 + O2  CO2 + H2O •  C3H8 + 5O2  3CO2 + 4H2O

  12. 3 - $100 • Which of the following is an example of a chemical reaction? Explain why. c. a. b. • B

  13. 3 - $200 Name three things that could happen if a chemical change occured Change in color Formation of a solid (precipitate) Change in temperature Production of a gas

  14. 3 - $300 • Is the following statement true or false. If false, correct the statement. Burning wood is evidence of a chemical change. • True.

  15. 3 - $400 Which of the following is evidence of a chemical reaction? • A piece of chalk is smashed into smaller pieces • Liquid water freezes and becomes ice • Your bike is left out in the rain and it starts to rust • Dissolve ice tea powder into water to make iced tea • C

  16. 3 - $500 What is the difference between a chemical and physical change? Give one example of both. Make sure to explain your answer. • A physical change is the change of a physical property (shape,color,size) and is easily reversible i.e. (seperation of a sand and gravel mixture) • A chemical change occurs when substances react to form a new chemical entity, same atoms are used but different molecules are created. Chemical changes are not reversible (would be very difficult to do so) i.e. (add a clear substance to another clear substance and the product is blue and bubbly)

  17. 4 - $100 • In the equation below, how many atoms of Magnesium are there in the product? Mg + TiCl4  MgCl2 + Ti • 2

  18. 4 - $200 • What does the coefficient infront of the Silver Iodide in the product mean? • PbI2 + 2Ag(NO3)  Pb(NO3)2 + 2AgI A. the reaction produces 3 molecules of Silver Iodide B. the reaction produces 2 atoms of Silver Iodide C. the reaction produces 2 atoms of Silver D. the reaction produces 2 molecules of Silver Iodide D

  19. 4 - $300 • What do you have to do at the end of balancing the equation to make sure you are correct? • You have to check to make sure all of the types of atoms on the reactant and product sides have the same number

  20. 4 - $400 • In the equation below how many molecules of are there of Silicone Sulfide in the product? Si + S8  Si2S4 2

  21. 4 - $500 • How do you balance a chemical equation? Write a set of rules. (**must be in proper order**) 1. Write the formulas of the reactants and products to give the unbalanced chemical equation. 2. Balance by trial and error starting with the most complicated molecule(s). Leave pure elements to the end. Work progressively through the elements. 3. Treat polyatomic ions as a unit if they are not affected by the reaction. 4. At the end check to be sure the equation is balanced (same numbers of all types of atoms on the reactant and product sides).

  22. 5 - $100 • What happens when an ionic compound is dissolved in water? The ions separate and move around independently.

  23. 5 - $200 • What does the Law of Conservation of Mass state? What does it mean? • The Law of Conservation of Mass states that in a chemical reaction there is no loss of mass. This means that each type of element will have the same amount before and after the reaction (in the reactant and product sides)

  24. 5 - $300 • Balance the following equation : AgNO3 + NaCl → AgCl(s) + NaNO3 • The chemical equation is already balanced.

  25. 5 - $400 • Balance the following equation: Na2CO3 + HCl NaCl + H2O + CO2 • Na2CO3 + 2HCl  2NaCl + H20 + CO2

  26. 5 - $500 • Balance the following equation: ___ CO2 + ___ H2O  ___ C6H12O6 + ___O2 • 6CO2 + 6H2O  C6H12O6 + 6O2

  27. Final Jeopardy • Using the following formulas as reactants and products make at least two correct equations. Br2, Fe2S3, H2O,I2,O2,Li,C3H8, Zn, LiOH, H2, KNO3, NaI Pb(NO3)2,CO2, Na2CO3, ZnCl2, K2S, and NaBr (you do not need to include states of matter) • Br2+ 2NaI  2NaBr+ I2 • 2Fe(NO3)3+3K2S  6KNO3+ Fe2S3 • 2Li+2H2O  2LiOH+ H2

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