Search results for “pH”

Chromatography Analytical Chemistry & Spectroscopy Dimensionless A family of separation techniques that partition components between a stationary and a mobile phase.

Chromophore Analytical Chemistry & Spectroscopy nm The part of a molecule responsible for absorbing light at a particular wavelength.

Column Chromatography Analytical Chemistry & Spectroscopy g A preparative technique in which a mixture is separated by passing it down a vertical column packed with stationary phase.

Coordination Sphere Inorganic & Coordination Chemistry Dimensionless The central metal together with the ligands directly attached to it, written inside square brackets. [M(L)ₙ]

Calorimetry Thermochemistry & Thermodynamics J The experimental measurement of heat exchanged during a physical or chemical change. q = mcΔT

Cannizzaro Reaction Organic Chemistry Dimensionless The disproportionation of an aldehyde with no alpha hydrogen under concentrated alkali into an alcohol and a carboxylate. 2RCHO + OH⁻ → RCH₂OH + RCOO⁻

Cell Notation Electrochemistry & Redox Dimensionless A shorthand convention for representing an electrochemical cell using vertical lines for phase boundaries. Zn(s) | Zn²⁺(aq) ‖ Cu²⁺(aq) | Cu(s)

Counter Ion Inorganic & Coordination Chemistry Dimensionless An ion outside the coordination sphere that balances the charge of the complex ion.

Critical Point States of Matter & Gas Laws K, Pa The unique combination of temperature and pressure at which the liquid and gas phases of a substance become indistinguishable. (T_c, p_c)

Carbanion Organic Chemistry Dimensionless An organic ion in which a carbon atom bears a negative charge and a lone pair. R₃C⁻

Catalysis Chemical Kinetics & Catalysis Dimensionless The process by which a reaction rate is increased through the action of a catalyst.

Cellular Respiration Biochemistry & Polymer Chemistry kJ/mol The oxidation of nutrients within cells to release energy as ATP. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

Chain Reaction Chemical Kinetics & Catalysis Dimensionless A self-sustaining reaction sequence in which a reactive intermediate regenerates itself at each cycle. initiation → propagation → termination

Chemical Equation Stoichiometry & Chemical Reactions Dimensionless A symbolic representation of a chemical reaction showing reactants on the left and products on the right. aA + bB → cC + dD

Chemical Property Foundations of Chemistry Various A characteristic that describes how a substance transforms into a different substance, observable only during a chemical reaction.

Chemisorption Chemical Kinetics & Catalysis kJ/mol Strong adsorption in which actual chemical bonds form between the adsorbate and the surface. ΔH ≈ −80 to −400 kJ/mol

Complexometric Titration Analytical Chemistry & Spectroscopy mol/L A titration based on the formation of a stable complex between the analyte metal ion and a chelating titrant. M²⁺ + EDTA⁴⁻ → [M(EDTA)]²⁻

Compound Foundations of Chemistry Dimensionless A pure substance formed when two or more different elements combine chemically in a fixed, whole-number mass ratio.

Coordination Isomerism Inorganic & Coordination Chemistry Dimensionless Isomerism in compounds containing both a complex cation and a complex anion, where ligands are distributed differently between them.

Critical Mass Nuclear & Radiochemistry kg The minimum mass of fissile material needed to sustain a nuclear chain reaction.

Cryoscopic Constant Solutions & Colligative Properties K·kg/mol The freezing point depression produced by a one-molal solution of a non-electrolyte in a given solvent. K_f = RT_f²M / ΔH_fus

Crystal Lattice Chemical Bonding & Molecular Structure Dimensionless The regular, repeating three-dimensional arrangement of particles in a crystalline solid.

Crystalline Solid States of Matter & Gas Laws Dimensionless A solid in which the constituent particles are arranged in a regular, repeating three-dimensional pattern extending over long distances.

Calomel Electrode Electrochemistry & Redox V A reference electrode based on the equilibrium between mercury, mercury(I) chloride and chloride ions. Hg₂Cl₂ + 2e⁻ ⇌ 2Hg + 2Cl⁻

Results for “pH”