atom inventory notes and pictures. how many atoms of each element are there on each side of the of...
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![Page 1: Atom Inventory Notes and Pictures. How many atoms of each element are there on each side of the of the equation? What should be true about the number](https://reader036.vdocuments.us/reader036/viewer/2022082817/56649e5d5503460f94b55475/html5/thumbnails/1.jpg)
Atom Inventory
Notes and Pictures
![Page 2: Atom Inventory Notes and Pictures. How many atoms of each element are there on each side of the of the equation? What should be true about the number](https://reader036.vdocuments.us/reader036/viewer/2022082817/56649e5d5503460f94b55475/html5/thumbnails/2.jpg)
How many atoms of each element are there on each side of the of the
equation?
What should be true about the number of atoms if conservation
occurs?
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Balanced Equation
• Shows a chemical reaction
• Shows the specific compounds that interact
• Shows the new compounds created
• Shows that matter is conserved, because the number of atoms of each element involved is the same before and after the reaction
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What does the equation show?
• A chemical reaction
• How different compounds chemically react with each other to form new compounds
• The compounds on the left (present at the start of the reaction) are called Reagents
• The compounds on the right (present at the end of the reaction) are called Products
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To balance an equation• Change only coefficients, not formulas
• Start with elements appearing only once on each side
• Balance the H’s and O’s generally last
• Double check to make sure each side of the equation has got the same number of atoms for each element
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How about this reaction?
• 2Ca (s) + O2 (g) 2CaO (s)
• How does the 2 in front of the CaO differ from the subscript after O?
• Does this represent matter that is conserved?
• Is the equation Balanced?
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Balanced equation
• A reaction equation whose Reagent and Product sides have the same number of atoms of each element involved
• Like a math equation, each side has the same overall amount
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Balancing equations
• For the equations to show conservation, they must be balanced
• Change Coefficients before each compound to balance the number of atoms of each element to be the same on both sides of the equation
• Do NOT change the subscripts
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Notes on balanced equation• Water will be written into the equation only if it
is broken up or created
• Just because a compound is in an aqueous solution does not mean water is an active ingredient
• The quantity of a compound needed for the chemical reaction is proportional to the coefficient in front of the compound