Types of Chemical Reactions

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Chemical ReactionsA chemical reaction is a process in which one or more reactants change to make one or more products.http://www.youtube.com/watch?v=uqDWbknpiVk&feature=related

http://www.youtube.com/watch?v=896vJj6eWYw&NR=1

https://www.youtube.com/watch?v=FofPjj7v414 **

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Evidence of Chemical Reactions

1. Flammabilityhttp://www.youtube.com/watch?v=uj9D3mc7tVg&feature=relatedhttp://www.youtube.com/watch?v=MUensqImzXMhttp://www.youtube.com/watch?v=7Xu2YZzufTM **https://www.youtube.com/watch?v=zdeSRRjaiTE **

2. Change of Colorhttps://www.youtube.com/watch?v=kKlXe2mrnHQ **

https://www.youtube.com/watch?v=C5tOEBmBAHg **http://www.youtube.com/watch?v=hVK9Om4wzBM&feature=related

3. Precipitate https://www.youtube.com/watch?v=BGUfC3UUBkI ** https://www.youtube.com/watch?v=GgNA-CAjfVQ ** http://www.youtube.com/watch?v=egfXTENCRA0

http://www.youtube.com/watch?v=8RmVwz2fNGc&feature=related

4. Gas Productionhttp://www.youtube.com/watch?v=ezsur0L0L1c&feature=related

http://www.youtube.com/watch?v=9vk4_2xboOEhttp://www.youtube.com/watch?v=uQ05eALMBEo&feature=related

Synthesis Reactions

A chemical reaction in which two or more substances react to form a single substance.

A + B AB

H2 + O2 H2O2

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Decomposition Reactions

A chemical reaction in which one compound breaks down to form two or more simpler substances.

AB A + B

CO2 C + O2 http://images4.wikia.nocookie.net/__cb20100211160001/muppet/images/thumb/c/cd/212-20.jpg/250px-212-20.jpg

Single-Replacement Reactions

A chemical reaction in which one element takes the place of another element in a compound.

A + BC AB + C

Zn + H2SO4 ZnSO4 + H2http://www.town.hull.ma.us/public_documents/hullma_memclass/hughes/0143F3CC-000F8513.0/Beaker%20and%20Dr.%20Bunsen%20Honeydew.jpg

Double-Replacement Reactions

A chemical reaction in which two compounds exchange positive ions and form two new compounds.

AB + CD AD + CB

CaCO3 + 2HCl CaCl2 + H2CO3

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Combustion Reactions

A chemical reaction in a substance reacts rapidly with oxygen often producing heat and light. Usually include the elementsC, H, and O and produce water.

CH4 + 2O2 CO2 + 2H2Ohttp://static.guim.co.uk/sys-images/Arts/Arts_/Pictures/2008/07/18/BeakerHoneydew140x844.jpg

Energy & Reactions

The energy stored in the chemical bonds of a substance: chemical energy

Reactions involve breaking chemical bonds in the reactants and forming chemical bonds in the products.

Energy & Reactions

By comparing the chemical energy of the reactants with the chemical energy of the products you can determine if energy (heat or light) is released or absorbed.

Exothermic – Energy Released https://www.youtube.com/watch?v=SKSU72-1ERc

Endothermic – Energy Absorbed https://www.youtube.com/watch?v=MyAzjSdc3Fc

Reaction Rates

Some reactions happen to slow.

A catalyst:• Speeds up the chemical reaction rate• Enables the reaction to occur at a lower temperature

(without being permanently changed)