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Chemical reactions classification

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Created on March 20, 2024

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Transcript

Chemical Reactions Classification

OBJECTIVES:

1. Classify chemical reactions.2. Identify the characteristics of different classes of chemical reactions in order to predict products.

1. SYNTHESIS REACTIONS

A + B AB
2Fe + 3Cl2 2FeCl3

2. COMBUSTION REACTIONS

Oxygen combines with a substance and releases energy in the form of heat and light.
A + O2 AO
2H2 (g) + O2 (g) 2H2O

3. DECOMPOSITION REACTIONS

A single compound breaks down into two or more elements or new compounds.
AB A + B
2NaN3 (S) 2Na (S) + 3N2 (G)

4. REPLACEMENT REACTIONS

SINGLE
A + BX AX + B
Cu (s) + 2AgNO3 (aq) 2Ag (s) + CuNO3 (aq)
DOUBLE
AX + BY AY + BX
CaCl2(aq) + 2NaCO3(aq) --> CaCO3 (S) + 2NaCl(aq)

PRACTICE PROBLEMS:

Write chemical equations for the following reactions. Classify each react in into as many categories as possible.

1. The solids aluminum and sulfur react to produce aluminum sulfide.2. The gases nitrogen dioxide and oxygen react to produce dinitrogen pentoxide gas. 3. Aluminum oxide (s) decomposes when electricity is passed through it. 4. Water and dinitrogen pentoxide gas react to produce aqueous hydrogen nitrate.

PRACTICE PROBLEMS:

Write chemical equations for the following reactions. Classify each react in into as many categories as possible.

1. HI --> H2 + I22. Al + I2 --> AlI3 3. FeO + O2 --> Fe2O3 4. C4H10 + O2 --> CO2 + H2O 5. AgNO3 + Na2S --> Ag2S + NaNO3 6. SO3 + H2O --> H2SO4 7. Na + MgI2 --> NaI + Mg