Presentation on theme: "Quick Write! You have 6 minutes! Describe the 4 main types of Chemical Reactions, as demonstrated in class, using the following components: Peanut butter."— Presentation transcript:
Quick Write! You have 6 minutes! Describe the 4 main types of Chemical Reactions, as demonstrated in class, using the following components: Peanut butter Chocolate Graham Cracker Almonds
Physical Science 1-24-07 Review Practice Team Work! Introduction to Balancing Formulas
REVIEW What are the components of a chemical reaction? ________ + __________ _________ Reactant Product What does the arrow mean in the equation? “Forms”, “ Produces”, or “ Yields”
REVIEW What type of Chemical Reaction does this photo represent? Double Displacement Reaction
REVIEW What type of reaction does this photo represent? Single Displacement Reaction
REVIEW And the last one we modelled? Decomposition Reaction
REVIEW In what type of reaction does oxygen react with a second compound producing CO 2 and H 2 O ? COMBUSTION Reaction
Team Work! Please locate your team members and quickly sit at one of the back 4 tables together. Team A: Sara, Christian, Carl, Justin, & Bill Team B: Joe, Ashlee, Courtney, & Tiffany Team C: James D., Brittney, Chelsey, Garrett, & Tim Team D: Lacy, James E., Kayla, & Brandon
Team Work! Each team is provided with a set of 5 cards (one for each type of reaction we have studied). Each slide that is projected here will display a new chemical reaction. As a team you have 20 seconds to decide which type of reaction it is and place that card, FACE DOWN, at the end of the table closest to the teacher. If you are correct, your team may talley one point on the chalk board. If you are incorrect, your team loses two points!!!!
GAME OVER! TALLEY UP THE POINTS EACH TEAM HAS…THE WINNING TEAM RECEIVES A PRIZE AT THE END OF CLASS.
WHAT ELSE CAN WE LEARN USING THESE REACTIONS? C + 2H 2 CH 4 HOW MANY ATOMS ARE THERE ON THE LEFT SIDE OF THE REACTION (TOTAL)? HOW MANY ATOMS ARE THERE ON THE RIGHT SIDE OF THE REACTION (TOTAL)?
C + 2H 2 CH 4 On the left side, there are ONE Carbon atom and FOUR Hydrogen atoms. (Note: 4 Hydrogen atoms, because the Coefficient gets multiplied by the subscript). This gives us 5 total atoms. On the right side (products), we also see ONE Carbon atom and FOUR Hydrogen atoms, for a total of 5 atoms. Notice that the number of atoms of each ELEMENT stays the same on each side!
Over the next couple of days, we will be discovering how to balance a chemical equation by manipulating the Coefficients. It is important to remember that we will not change the subscript numbers in the formulas at any time. (*Few exceptions to this rule may be pointed out later to you.) Bring your books, your thinking caps and a writing utensil tomorrow….and find out more!!!