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CHEMICAL REACTIONS, K - Coggle Diagram
CHEMICAL REACTIONS
Single Displacement
This reaction happens when one element replaces or switch spot with another element in a compound.
Formula : A + BC --> AC + B
- A metal replace another metal in an ionic compound. Example : Al + FeCl2 --> Fe + AlCl3
- A non-metal replaces another non-metal in an ionic compound. Example : Cl2 + NaBr --> NaCl + Br2
- A metal replace Hydrogen in water or an acid. Example : Zn + 2HCl --> H2 + ZnCl
In order for an element to replace another element in a compound, that element need to have a higher reactivity. There will be no reaction happen if the element's reactivity is lower than the reactivity of the element in a compound.
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When displacing hydrogen in water or acid, there are only several elements can displace, they are highly reactive.
For acid : the elements can displace hydrogen are elements above Hydrogen in the activity series table
For water : The elements can displace hydrogen are above magnesium in the activity series table
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Combustion
What: A reaction in which a fuel burns or reacts quickly with oxygen.
The products of this reaction are usually oxide and energy. Basically, anything that burns with oxygen gas is a combustion reaction
Important term: Hydrocarbon is a compound that contains hydrogen and carbon
*When oxygen is plentiful, hydrocarbons burn completely to release the energy they contain. The product is carbon dioxide and water. The combustion of hydrocarbon is always the same
Identifying feature: Hydrocarbon + O₂ ⟶ CO₂ + H₂O + energy
There are 2 major types of combustion reaction:
1) Complete combustion: happens when there is A LOT of oxygen and thus, it will generate a blue flame since there is more oxygen
2) Incomplete combustion: combustion of hydrocarbons when there is limited oxygen and thus, produces yellow/ orange flame.
*Blue flame is hotter than yellow / orange flame
Formula for complete combustion: CxHy + O2 → CO2 + H2O
Formula for incomplete combustion: CxHy + O2 → CO2 + CO + C + H2O
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DECOMPOSTITION REACTION
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Concepts
A reaction in which one substance will break down into its parts.
These reactions can have any mixture or number of products; however, can only have a single reactant, therefore, the defining factor for these reactions is the single reactant.
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