Results for “pH”
291 terms · page 12 of 13
Organic Chemistry
The study of the structure, properties, composition and reactions of carbon-containing compounds.
Electrochemistry & RedoxOverpotential
The extra voltage beyond the theoretical value that must be applied before an electrode reaction proceeds at a useful rate.
Foundations of ChemistryPolyatomic Ion
A covalently bonded group of atoms that carries an overall electrical charge and behaves as a single unit in reactions.
Inorganic & Coordination ChemistryPolydentate Ligand
A ligand that binds to a single metal centre through three or more donor atoms.
Acids, Bases & SaltsPolyprotic Acid
An acid capable of donating more than one proton per molecule.
Analytical Chemistry & SpectroscopyPrimary Standard
A highly pure, stable substance that can be weighed accurately and used directly to prepare a solution of known concentration.
Atomic Structure & PeriodicityQuantum Mechanical Model
The modern description of the atom in which electrons are represented by wavefunctions giving probability distributions rather than…
Nuclear & RadiochemistryRadioactive Tracer
A radioisotope introduced into a system so that its pathway can be followed by detecting its radiation.
Nuclear & RadiochemistryRadioactivity
The spontaneous emission of particles or electromagnetic radiation from unstable atomic nuclei.
Chemical Kinetics & CatalysisRate-Determining Step
The slowest step in a reaction mechanism, which limits the overall rate.
Chemical Kinetics & CatalysisReaction Intermediate
A species produced in one step of a mechanism and consumed in a later one, so it does not appear in the overall equation.
Atomic Structure & PeriodicityRydberg Formula
The empirical equation predicting the wavelengths of the spectral lines emitted by a hydrogen-like atom.
Chemical Kinetics & CatalysisSecond-Order Reaction
A reaction whose rate depends on the square of one concentration or on the product of two concentrations.
Analytical Chemistry & SpectroscopySecondary Standard
A solution whose concentration has been established by titration against a primary standard.
Chemical EquilibriumSimultaneous Equilibria
Several equilibria existing together in the same solution, all satisfied at once.
Chemical Bonding & Molecular Structuresp Hybridisation
The mixing of one s and one p orbital to give two linear hybrid orbitals at 180° to each other.
Thermochemistry & ThermodynamicsSpontaneity
The tendency of a process to occur without any continuous external input of energy.
Thermochemistry & ThermodynamicsStandard State
The reference condition of a pure substance at 1 bar pressure and a stated temperature, conventionally 298.15 K.
Analytical Chemistry & SpectroscopyStandardisation
The determination of the exact concentration of a solution by titrating it against a primary standard.
States of Matter & Gas LawsSurface Tension
The energy required to increase the surface area of a liquid by unit amount, arising from unbalanced intermolecular forces at the surface.
Thermochemistry & ThermodynamicsSurroundings
Everything outside the chosen system with which it can exchange energy or matter.
Thermochemistry & ThermodynamicsThermodynamics
The branch of science dealing with energy, its transformations, and the direction in which processes occur.
Acids, Bases & SaltsTitration
A quantitative technique in which a solution of known concentration is added to another until the reaction between them is exactly complete.
Chemical Kinetics & CatalysisTransition State
The highest-energy configuration along the reaction coordinate, at which bonds are partly broken and partly formed.