// chemistry

⚗ Chemistry

Concentration, colligative properties, kinetics, equilibrium, and electrochemistry.

Periodic Table

Elements Explorer 1

Interactive Periodic Table 118 elements - click to explore

Chemical Kinetics

Rate Laws 1

First Order Rate Law k = \frac{2.303}{t}\,\log\frac{[A]₀}{[A]}

Reaction Rate 1

Rate of Reaction \text{Rate} = \frac{-Δ[R]}{Δ t}

Temperature Dependence 1

Arrhenius Equation k = A\,e⁻Eₐ / (R\,T)

Colligative Properties

Dissociation 1

van 't Hoff Factor (i) i = \frac{\text{observed effect}}{\text{calculated effect}}

Freezing & Boiling Points 2

Gas Solubility 1

Henry's Law P = kH × x

Osmosis 1

Osmotic Pressure (π = CRT) π = C × R × T

Vapour Pressure 1

Raoult's Law PA = xA × PA\circ

Electrochemistry

Cell Potential 1

Nernst Equation E = E\circ - \frac{0.0591}{n}\log Q

Electrolysis 1

Faraday's Law of Electrolysis W = \frac{E\,I\,t}{96500}

Thermodynamics 1

Gibbs Free Energy (ΔG) Δ G = Δ H - TΔ S

Equilibrium & Acids/Bases

Acids & Bases 2

Ionic Product of Water (K_w) Kw = [H^+][OH^-] = 10⁻¹⁴
pH Calculator \text{pH} = -\log[H^+]

Equilibrium 2

Equilibrium Constant (K_c) Kᴄ = \frac{[\text{Products}]}{[\text{Reactants}]}
Solubility Product (K_sp) Ksp = [A^+][B^-]

Solutions & Concentration

Concentration Units 4

Molality (m) m = \frac{n × 1000}{W}
Molarity (M) M = \frac{w × 1000}{Mw × V}
Mole Fraction (x) xA = \frac{nA}{nA + nB}
Normality (N) N = \frac{w × 1000}{E × V}

Thermochemistry

Reaction Enthalpy 1

Hess's Law Δ H = Σ Δ Hproduᴄts - Σ Δ Hreₐᴄtₐnts