–Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.
-
Upload
virginia-caldwell -
Category
Documents
-
view
223 -
download
0
Transcript of –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.
![Page 1: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/1.jpg)
![Page 2: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/2.jpg)
–Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken
![Page 3: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/3.jpg)
–Chemical reactions involve changes in matter, the making of new materials with new properties, and energy changes.
![Page 4: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/4.jpg)
–Symbols represent elements, formulas describe compounds, chemical equations describe a chemical reaction
![Page 5: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/5.jpg)
Items to the LEFT of the arrow in a chemical equation are called
REACTANTS.
2Na + Cl2 2NaCl
![Page 6: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/6.jpg)
Items to the right of the
arrow are called
PRODUCTS.
Ex: 2Na + Cl2 2NaCl
![Page 7: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/7.jpg)
Important NOTE:
No matter how many reactants and products are involved, all atoms present at the start of a reaction are present at the end.
![Page 8: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/8.jpg)
THE TOTAL MASS OF THE REACTANTS MUST EQUAL THE TOTAL MASS OF PRODUCTS.
MATTER IS NEVER CREATED OR DESTROYED.
![Page 9: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/9.jpg)
A number that tells how many molecules of a substance are involved in a
chemical reaction.
A coefficient of 1 is not written.
![Page 10: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/10.jpg)
Subscripts• A subscript indicates how many
atoms of an element are in a compound
Ex. H2SO4
H= 2 S = 1 O = 4
![Page 11: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/11.jpg)
Subscripts vs. Subscripts vs. CoefficientsCoefficients
![Page 12: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/12.jpg)
+ -- used to separate two reactants or products.
(yields) Separates reactants and products.
![Page 13: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/13.jpg)
Reactions that release heat.
![Page 14: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/14.jpg)
Reactions that absorb heat.
![Page 15: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/15.jpg)
A substance that speeds up chemical reactions.
![Page 16: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/16.jpg)
A substance that slows down a chemical reaction.
![Page 17: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/17.jpg)
![Page 18: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/18.jpg)
Reactions that have hydrocarbons (CH4) and oxygen as reactants, and carbon dioxide and water as products.
![Page 19: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/19.jpg)
Example:
C3H8 + 5O2 3CO2 + 4H2O
![Page 20: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/20.jpg)
![Page 21: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/21.jpg)
2Na + Cl2 2NaCl
Na2O + CO2 Na2CO3
![Page 22: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/22.jpg)
Starts with one reactant and ends with 2 or more products.
![Page 23: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/23.jpg)
2KClO3 2KCl + 3O2
2NaCl 2Na + Cl2
![Page 24: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/24.jpg)
One compound and a free element that recombine to yield a new compound and new free element.
![Page 25: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/25.jpg)
Fe + CuSO4 Cu + FeSO4
2Na + 2HCl H2 + 2NaCl
![Page 26: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/26.jpg)
Starts with 2 compounds as reactants. These recombine to form 2 new compounds as products.
+ +
![Page 27: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/27.jpg)
NaCl + AgNO3 NaNO3 + AgCl
KOH + HNO3 HOH + KNO3
![Page 28: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/28.jpg)
![Page 29: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/29.jpg)
C + O2 ----- CO2
![Page 30: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/30.jpg)
2NaCl 2Na + Cl2
![Page 31: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/31.jpg)
FeCl2 + K2S FeS + 2KCl
![Page 32: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/32.jpg)
C2H4 + 3O2 2CO2 + 2H2O
![Page 33: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/33.jpg)
2AlCl3 + 3Na2CO3 Al2(CO3)3 + 6NaCl
![Page 34: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/34.jpg)
CS2 + 3O2 CO2 + 2SO2
![Page 35: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/35.jpg)
3Fe + 4H2O Fe3O4 + 4H2
![Page 36: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/36.jpg)
2AlCl3 2Al + 3Cl2
![Page 37: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/37.jpg)
2Na + H2SO4 ---> Na2SO4 + H2
![Page 38: –Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken.](https://reader035.fdocuments.net/reader035/viewer/2022062304/56649de65503460f94adee0d/html5/thumbnails/38.jpg)
2Cr + 3O2 2CrO3