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chemists.(｡◕‿‿◕｡)
chloe ko.
christina chow.
mr. doktor's chemistry class
block g
- stoichiometry is a branch of chemistry that deals with the quantitive analysis of chemical reactions
- it is a generalization of mole conversions to chemical reactions
- understahe 6 types of chemical reactions is the foundation of stoichiometry
6 types of reactions
Synthesis: - A + B --> AB
- usually elements --> compounds
- balance the following equations
1. 3Cu + 2P --> Cu3P2
2. Sr + S --> SrS
3.3Mg + N2 --> Mg3N2
Decomposition: - AB --> A + B
- reverse of synthesis
- always assume the compounds decompose into elements during decomposition
- balance the following decomposition reactions
1.2H2O --> 2H2 + O2
2. C6H12O6 --> 6C + 6H2 + 3O2
3.6NaHCO3 -->3Na2CO3 +3H2O + 3CO2
Single Replacement: - A + BC --> B + AC - balance the following reactions
1. Mg + 2H2O --> Mg(OH)2 + H2
2. Zn +2HCl --> ZnCl2 + H2
3.2KI + Cl2 -->2KCl + I2
Double Replacement: - AB + CD --> AD + BC
- balance the following : * metals always first*
1. NaCl + AgNO3 --> NaNO3 + AgCl
2. Pb(NO3)2 +2KI --> PbI2 + 2KNO3
3.AgNO3 + KCl --> AgCl+ KNO3
Neutralization: -reaction with an acid and a base -balance the following 1. HBr + NaOH --> NaBr + H2O 2. HCl + NaOH--> H2O + NaCl
3. HBr + NaOH --> NaBr + H2O
Combustion: - reactions of something (usually hydrocarbon) w/ air
- hydrocarbon combustion always produces CO2 + H2O - balance the following
1. 2Cu + O2 -->2CuO
2. C10H8 +12O2 --> 10CO2 + 4H2O
3. C3H8 + 5O2--> 3CO2 +4H2O
