IIIIIIIVV Ch. 8 – Chemical Reactions III. Types of Chemical Reactions (p. 256 - 267)
IIIIIIIVV I.Intro to Reactions Chemical Reactions.
-
Upload
opal-bryan -
Category
Documents
-
view
214 -
download
2
Transcript of IIIIIIIVV I.Intro to Reactions Chemical Reactions.
![Page 1: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/1.jpg)
I II III IV V
I. Intro to Reactions
Chemical Reactions
![Page 2: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/2.jpg)
A.Signs of a Chemical Reaction
Evolution of heat and light Formation of a gas Formation of a precipitate Color change
http://www.youtube.com/watch?v=fF6FUVxAVzI
![Page 3: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/3.jpg)
B.Law of Conservation of Mass mass is neither created nor
destroyed in a chemical reaction
4 H
2 O
4 H
2 O4 g 32 g
36 g
total mass stays the same atoms can only rearrange
![Page 4: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/4.jpg)
C. Chemical Equations
A+B C+DREACTANTS PRODUCTS
![Page 5: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/5.jpg)
C. Chemical Equations
![Page 6: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/6.jpg)
D. Writing Equations
Identify the substances involved.
Use symbols to show:
2H2(g) + O2(g) 2H2O(g)
· How many? - coefficient· Of what? - chemical formula· In what state? - physical state
Remember the diatomic elements.
![Page 7: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/7.jpg)
D. Writing Equations
Two atoms of aluminum react with three units of aqueous copper(II) chloride to produce three atoms of copper and two units of aqueous aluminum chloride.• How many?
• Of what?• In what state?
Al 2 (s) + 3CuCl2(aq) 3 Cu(s) + 2AlCl3(aq)
![Page 8: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/8.jpg)
E. Describing Equations
Describing Coefficients:
· individual atom = “atom”
· covalent substance = “molecule”
· ionic substance = “unit”3 molecules of carbon dioxide
2 atoms of magnesium
4 units of magnesium oxide
3CO2
2Mg
4MgO
![Page 9: IIIIIIIVV I.Intro to Reactions Chemical Reactions.](https://reader036.fdocuments.in/reader036/viewer/2022072010/56649da95503460f94a970a5/html5/thumbnails/9.jpg)
E. Describing Equations
to produce
• How many?• Of what?• In what state?
Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)
One atom of solid zinc
reacts withtwo molecules of
aqueous hydrochloric acid
one unitof aqueous zinc
chlorideand onemolecule of hydrogen
gas.