chemical reactions
DESCRIPTION
Year 9 Chemical Reactions - For additional resources visit: http://www.iheartscience.netTRANSCRIPT
![Page 1: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/1.jpg)
Chemical ReactionsSarah Jones
www.roligaprylar.se
![Page 2: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/2.jpg)
Chemical Equations
![Page 3: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/3.jpg)
Law of Conservation of Mass
Antoine Lavoisier discovered the Law of Conservation of Mass.
http://www.unit5.org/chemistry/Equations.html
http://en.wikipedia.org/wiki/Law_of_conservation_of_mass
The total mass of the reactants or starting materials must be equal to the mass of the products.
![Page 4: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/4.jpg)
Meaning of Chemical Formula
http://www.unit5.org/chemistry/Equations.html
![Page 5: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/5.jpg)
Showing States
(s) Solid (l) Liquid (g) Gas (aq) Aqueous
http://www.unit5.org/chemistry/Equations.html
![Page 6: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/6.jpg)
http://www.unit5.org/chemistry/Equations.html
![Page 7: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/7.jpg)
http://en.wikipedia.org/wiki/Chemical_equation
![Page 8: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/8.jpg)
http://www.unit5.org/chemistry/Equations.html
![Page 9: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/9.jpg)
Endothermic Reactions• Need energy to proceed and get their energy
from their surroundings.• Chemical cold pack – when the chemicals
inside react they absorb energy from their surroundings – cooling them down.
chemicalrecipes.blogspot.com
![Page 10: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/10.jpg)
Exothermic Reactions• Release energy• The reactants have more energy than the
products.• Energy is usually released as heat and/or light.
en.wikipedia.org
![Page 11: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/11.jpg)
Combustion Reactions• Exothermic• When something reacts with oxygen gas –
burning or exploding.
wall.alphacoders.com
![Page 12: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/12.jpg)
Pollution and Climate Change
jurnalpedia.com
![Page 13: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/13.jpg)
Corrosion Reactions• Chemical reactions that breaks metals down
to form other compounds.
www.european-coatings.com
![Page 14: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/14.jpg)
Acid Reactions Acids can corrode metals – usually form salt and hydrogen gas.
www.nps.gov
![Page 15: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/15.jpg)
Neutralisation Reactions
Acids and bases neutralise each other.
Acid + Base Salt + Water
commons.wikimedia.org
![Page 16: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/16.jpg)
Acids and Carbonates
Acid + Carbonate Salt + Water + Carbon Dioxide
spmchemistry.onlinetuition.com.my
![Page 17: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/17.jpg)
sco.wikipedia.org
www.syngenta.com
![Page 19: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/19.jpg)
http://mrkubuske.files.wordpress.com
![Page 20: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/20.jpg)
Human Respiration
http://mrkubuske.files.wordpress.com
![Page 21: Chemical Reactions](https://reader036.vdocuments.site/reader036/viewer/2022081413/54995a23b47959d03d8b4599/html5/thumbnails/21.jpg)
Comparing Photosynthesis and Respiration
www.accessexcellence.org