Search results for “pH”

Atomic Absorption Spectroscopy Analytical Chemistry & Spectroscopy ppm A technique that measures the concentration of a metal from the light its free gaseous atoms absorb. A = εlc

Atomic Orbital Atomic Structure & Periodicity Dimensionless A mathematical function describing the region around a nucleus where an electron of given energy is most likely to be found. |ψ|² = probability density

Atomicity Foundations of Chemistry Dimensionless The number of atoms present in one molecule of an element.

Basic Solution Acids, Bases & Salts mol/L A solution in which the hydroxide ion concentration exceeds the hydrogen ion concentration. [OH⁻] > [H⁺]

Boiling Point States of Matter & Gas Laws °C The temperature at which the vapour pressure of a liquid equals the external pressure acting on it. p_vap = p_external

Boiling Point Elevation Solutions & Colligative Properties °C The rise in a solvent's boiling point caused by the presence of a non-volatile solute. ΔT_b = i K_b m

Bond Polarity Chemical Bonding & Molecular Structure Dimensionless The degree of unequal electron sharing in a covalent bond, arising from an electronegativity difference between the bonded atoms. Δχ = |χ_A − χ_B|

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.

Daniell Cell Electrochemistry & Redox V The classic galvanic cell consisting of a zinc electrode in zinc sulfate and a copper electrode in copper sulfate. Zn + Cu²⁺ → Zn²⁺ + Cu, E° = 1.10 V

Debye–Hückel Limiting Law Chemical Equilibrium Dimensionless The theoretical relation predicting activity coefficients of ions in very dilute solution from their charge and the ionic strength. log γ = −A z² √I

Decantation Foundations of Chemistry Dimensionless The separation of a liquid from a settled solid or a denser immiscible liquid by carefully pouring off the upper layer.

Results for “pH”