Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical...
-
Upload
ronald-hatcher -
Category
Documents
-
view
229 -
download
1
Transcript of Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical...
![Page 1: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/1.jpg)
Chemical equation the symbolic representation of a chemical reaction (process) wherein thereactant entities are on left side and change intoproduct entities on right-hand side
![Page 2: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/2.jpg)
Chemical Equation SymbolsThe arrow can be read as “yields” or “produces”
The + sign reads as “and” or “plus”
![Page 3: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/3.jpg)
Chemical Equation SymbolsThe arrow can be read as “yields” or “produces”Coefficients are the numbers in front of the formulasCoefficients can be changed to balance chemical equations
Subscripts tell us how many atoms or molecules we haveNEVER change subscripts when balancing chem. equations
![Page 4: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/4.jpg)
Balancing Equations like solving a puzzle
Br2 + Al Al2Br6 (not balanced)
Balance using coefficients
![Page 5: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/5.jpg)
Balancing Equations
Reactants Products
O2 + H2 H2O
![Page 6: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/6.jpg)
Balancing Equations
Reactants Products
O2 + H2 H2O but this equation is not balanced
why not?
![Page 7: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/7.jpg)
Balancing Equations
Conservation of Mass- Mass and/or Atoms are not Created or Destroyed during a chemical reaction. There must be the Same number of atoms on each side of the equation to balance the chemical equation.
![Page 8: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/8.jpg)
Steps to Balance Chemical Equations1. Write unbalanced equation.
2. Count # atoms on each side.
3. Add coefficients to make #s of atoms equal.
Coefficient subscript = # of atoms
4. If necessary reduce coefficients to lowest possible ratio (never change subscripts)
5. Update and Double check atom balance!!!
![Page 9: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/9.jpg)
Balancing Equations
Step 1. Write unbalanced equation
O2 + H2 H2O
![Page 10: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/10.jpg)
Balancing Equations
Step 2. Count # of atoms on each side
O2 + H2 H2O
O = 2 0 = 1
H = 2 H = 2
![Page 11: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/11.jpg)
Balancing Equations
3. Add coefficients to make # of atoms = on each side
O2 + H2 H2O
O = 2 0 = 1
H = 2 H = 2
![Page 12: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/12.jpg)
Balancing Equations
3. Add coefficients to make # of atoms = on each side
O2 + 2 H2 2 H2O
O = 2 0 = 2
H = 4 H = 4
![Page 13: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/13.jpg)
Balancing Equations
4. If necessary find lowest ratio (never change subscripts)
O2 + 2 H2 2 H2O
O = 2 0 = 2
H = 4 H = 4
![Page 14: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/14.jpg)
Balancing Equations
5. Update and double check work
O2 + 2 H2 2 H2O
O = 2 0 = 2
H = 4 H = 4
![Page 15: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/15.jpg)
Balancing Steps
1. Write the unbalanced equation.
Al + CuCl2 Cu + AlCl3
![Page 16: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/16.jpg)
Balancing Steps1. Write the unbalanced equation.
2. Count atoms on each side.
Al + CuCl2 Cu + AlCl3
1 Al 1
1 Cu 1
2 Cl 3
![Page 17: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/17.jpg)
Balancing Steps1. Write the unbalanced equation.
2. Count atoms on each side.
3. Add coefficients to make #s equal.
Coefficient subscript = # of atoms
Al + CuCl2 Cu + AlCl3
1 Al 1
1 Cu 1
2 Cl 3
![Page 18: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/18.jpg)
Balancing Steps1. Write the unbalanced equation.
2. Count atoms on each side.
3. Add coefficients to make #s equal.
Coefficient subscript = # of atoms
Al + 3 CuCl2 Cu + 2 AlCl3
1 Al 2
3 Cu 1
6 Cl 6
![Page 19: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/19.jpg)
Balancing Steps1. Write the unbalanced equation.
2. Count atoms on each side.
3. Add coefficients to make #s equal.
Coefficient subscript = # of atoms
2 Al + 3 CuCl2 3 Cu + 2 AlCl3
2 Al 2
3 Cu 3
6 Cl 6
![Page 20: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/20.jpg)
Balancing Steps1. Write the unbalanced equation.
2. Count atoms on each side.
3. Add coefficients to make #s equal.
Coefficient subscript = # of atoms
4. Reduce coefficients to lowest possible ratio, if necessary.
5. Double check atom balance!!!
![Page 21: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/21.jpg)
Helpful Tips• Balance one element at a time. Balance most
complicated compound first! • Update ALL atom counts after adding a
coefficient.• Balance (polyatomic ions) as (single units).
– “1 SO4” instead of “1 S” and “4 O”
• Balance most complicated compound first, balance
oxygen and hydrogen last (MINOH metals, ions, non-metals, oxygen, hydrogen)
• Ask yourself this question what am I forced to do to balance the equation???
![Page 22: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/22.jpg)
Examples
____ Mg + ____ O2 ____ MgO
![Page 23: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/23.jpg)
Examples
2 Mg + O2 2 MgO
![Page 24: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/24.jpg)
Examples
____ Al + ____ S ____ Al2S3
![Page 25: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/25.jpg)
Examples
2 Al + 3 S Al2S3
____ C3H8 +____ O2 ____ CO2 + ____ H2O
![Page 26: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/26.jpg)
Examples
2 Al + 3 S Al2S3
C3H8 + 5 O2 3 CO2 + 4 H2O
![Page 27: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/27.jpg)
More Examples
___ Al +____ H2SO4 ____Al2(SO4)3 +____ H2
![Page 28: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/28.jpg)
More Examples
2 Al + 3 H2SO4 Al2(SO4)3 + 3 H2
![Page 29: Chemical equation the symbolic representation of a chemical reaction (process) wherein thechemical reaction reactantreactant entities are on left side.](https://reader036.fdocuments.net/reader036/viewer/2022062313/56649c875503460f9493f26a/html5/thumbnails/29.jpg)
Helpful Tips• Balance one element at a time.
• Update ALL atom counts after adding a coefficient.
• Balance (polyatomic ions) as (single units).– “1 SO4” instead of “1 S” and “4 O”
• Balance most complicated compound first, balance oxygen and hydrogen last
• Ask yourself this question what am I forced to do to balance the equation???