tootsie pop chemistry
Post on 09-Feb-2016
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Chemical Symbols, Formulas,
and Equations
Tootsie Pop Chemistry
Supplies
• Tootsie-Pop (different color for each person in the group)
• Colored pencils• Colored squares of paper to
represent additional pop wrappers• Arrows and + signs• Science notebooks
PurposeUse chemical symbols to
represent chemical formulas and
equations.
If the flavors of Tootsie-Roll Pops
represent different atoms or elements, how many different combinations can
your group create?
•In your notebook, draw a picture of each combination.
•Which group can find the most combinations within 3 minutes?
• How many different kinds of atoms are represented by your Tootsie-Roll Pops?
• How many different combinations did your group make?
• Do you think any other group had the same combinations as your group did?
• Were there other combinations your group didn’t think of?
•What might this activity suggest about elements?
•Draw a picture description of this combination.
•Now write a description of this combination in words.
Can you think of a better way?
• Drawing pictures or writing out descriptions is quite tiresome and time-consuming.
• Let’s give each color a symbol.
• You can unwrap your lollipop now!!!
•Grape – G•Cherry – Ch•Chocolate – Cc•Orange – Or•Green – Gn•Raspberry -R
•Make three different combinations using the wrappers and describe them using the color symbols.
Use symbols to describe the following combinations:
• orange and chocolate
• chocolate, grape, and cherry
• grape, cherry, orange, and green
•OrCc
•CcGCh
•GChOrGn
• Sets of symbols like GCh and OrCcG are called formulas. Each symbol represents one kind of atom.
• If you have more than one of the same kind of atom in a formula you place that number after and a little below the line to show the number of atoms.
• This number is called a subscript.
• Example – Or2Cc
• Using the wrappers and colored paper squares, arrange the ‘atoms’ in the following combinations.
• If there is more than one ‘atom’, place the same ‘atoms’ on top of each other, but make sure you can count how many there are.
3 cherries and 5 chocolates
Now write the formula -
Ch3Cc5
1 orange and 2 grapes
OrG2
4 chocolates, 2 greens, 3 cherries
Cc4Gn2Ch3
Law of Conservation of Mass
• Matter can neither be created nor destroyed during a chemical change.
• The total mass of all substances must be equal to the total mass after a chemical change.
• There can be no loss of mass nor gain of mass during a chemical change.
OrCh2 + CcG2 OrCcG4 + CcCh2
• Make the following combinations with your wrappers and papers.
• Compare and record the number of ‘atoms’ on each side of the arrow.
_____ Or _____ Or
_____ Ch _____ Ch
_____ Cc _____ Cc
_____ G _____ G
CcG + OrGn2 OrG2 + CcGn
Or + Ch2 Ch2Or
G + R2Ch RChG + R2
What needs to be done to have these
combinations of atoms obey the Law of
Conservation of Mass?
Stay tuned…….
Tomorrow we will use coefficients to balance
these equations!!
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