9/26/11 78 Balancing Equations 10/28/ Balancing Equations 10/28/2013 Starter: Label the parts of the equation: Practice/Application/Connection/ Paste Notes/Quiz here when graded: Exit: 1.In the following equation, the elements are rearranged to form new products. What should be placed in the box to the right? C+ O 2

October 25, 2013 AGENDA 8.5 F. I will be able to recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass by reading, and writing while completing notes and activity. 1 Starter 2. Activity

Label the parts of the equation Coefficient Chemical Formula Element yields subscript

DateLecture/ Activity/ Lab Page 9/25 Metal, Nonmetals, and Metalloids /26 Where’s Al? /27 Element Wanted Poster /30 Bohr Model Challenge /1 Periodic Table Notes/Puzzles /2 Periodic Table Chart /3 Test Review /8 Test Corrections /9 Molecules, Compounds, and Elements /10 Build a Molecule Activity /15 Counting Atoms /16 Counting Atoms with Coefficients /17 Writing Chemical Formulas /18 Physical and Chemical Changes/Properties Notes /21 Chemical Equations and the Conservation of Mass /22 Balancing Equations /24 Beady Balance /25 See Saw Poster Oct 28 Signs of a Chemical change Table of Contents

Signs of a Chemical Change Gas Formation Sound/ light EnergyChange Precipitate Color Change

PRECIPITATE Formation of a Solid A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.

ENERGY Temperature Change When two substances are combined, any increase or decrease in temperature is a sign of a chemical change. The temperature may change very suddenly or occur over a long period of time. If the temperature rises and gives off heat, the reaction is said to be exothermic. A drop in temperature indicates that the reaction is endothermic.

COLOR CHANGE A reaction has occurred if two solutions are mixed and there is a color change that is not simply the result of a dilution of one of the reactant solutions.

SOUND/ LIGHT When a substance is altered, light and sound indicate quick changes in temperature. A fireworks display is a good example of the presence of light and sound during a chemical reaction..

BUBBLES Gas Formation If the reaction between two liquids or a solid and a liquid gives off gases, it is likely that a chemical change has occurred. Small bubbles that form inside the liquid underneath the surface are enough to indicate a chemical reaction is taking place.

Remember IT! Please Excuse Coughs Sneezes and Burps P- Precipitate- Solid formation E- Energy Change-Temperature C- Color Change S- Sound/ LightB- Bubbles- Gas Formation

Spooky Video Quiz Describe how you know that a chemical reaction is happening.

1.Dragon Breath 2. Genie in a bottle 3Pumpkin Brains What clues helped you determine your answer? 4. Instant Worms 5.Self Carving Pumpkin 6.Liquid Light

9/26/11 78 Balancing Equations 10/28/ Balancing Equations 10/28/2013 Starter: Label the parts of the equation: Practice/Application/Connection/ Paste Notes/Quiz here when graded: Exit: 1.In the following equation, the elements are rearranged to form new products. What should be placed in the box to the right? C+ O 2