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  root((Chemistry))
    Organic
      Functional Groups
      Reaction Mechanisms
      Nomenclature
    Inorganic
      Periodic Trends
      Coordination Chemistry
      Main Group Elements
    Physical
      Thermodynamics
      Kinetics
      Equilibrium
    Analytical
      Titrations
      Spectroscopy
      Separations

Quick Reference Links

Formulas and Constants: See formulas.md
Organic Reactions: See organic-reactions.md
Periodic Table Data: See periodic-table.md

Diagram Patterns

Molecular Structure (ASCII)

        H   H
         \ /
          C = C
         / \
        H   H
      (Ethene)

Reaction Mechanism (Mermaid)

flowchart LR
    A[Substrate] -->|Nucleophile attacks| B[Transition State]
    B -->|Leaving group departs| C[Product]

Electron Configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶

Problem-Solving Patterns

Stoichiometry Problems

Write balanced equation
Convert given to moles (using molar mass or molarity)
Use mole ratio from balanced equation
Convert to requested units

pH Calculations

Type	Formula
Strong acid	pH = -log[H⁺]
Strong base	pOH = -log[OH⁻], pH = 14 - pOH
Weak acid	pH = ½(pKa - log C)
Buffer	pH = pKa + log([A⁻]/[HA])

Redox Balancing (Acidic Solution)

Separate into half-reactions
Balance atoms except O and H
Balance O with H₂O
Balance H with H⁺
Balance charge with e⁻
Multiply to equalize electrons
Add half-reactions

Common Notation

Symbol	Meaning
(aq)	Aqueous solution
(s)	Solid
(l)	Liquid
(g)	Gas
⇌	Reversible reaction
→	Forward reaction
Δ	Heat applied
↑	Gas evolved
↓	Precipitate formed

Lewis Structure Steps

Count total valence electrons
Draw skeleton structure (central atom)
Place bonding pairs
Distribute remaining electrons as lone pairs
Check octets (or duets for H)
Form multiple bonds if needed

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