Results for “pH”
291 terms · page 3 of 13
Buffer Range
The span of pH values over which a buffer works effectively, conventionally one unit either side of its pKa.
Acids, Bases & SaltsBuffer Solution
A solution that resists changes in pH when small amounts of acid or base are added.
Thermochemistry & ThermodynamicsCalorimetry
The experimental measurement of heat exchanged during a physical or chemical change.
Organic ChemistryCannizzaro Reaction
The disproportionation of an aldehyde with no alpha hydrogen under concentrated alkali into an alcohol and a carboxylate.
Electrochemistry & RedoxCell Notation
A shorthand convention for representing an electrochemical cell using vertical lines for phase boundaries.
Inorganic & Coordination ChemistryCounter Ion
An ion outside the coordination sphere that balances the charge of the complex ion.
States of Matter & Gas LawsCritical Point
The unique combination of temperature and pressure at which the liquid and gas phases of a substance become indistinguishable.
States of Matter & Gas LawsDeposition
The direct conversion of a vapour into a solid without an intermediate liquid phase.
States of Matter & Gas LawsEvaporation
The escape of molecules from the surface of a liquid into the vapour phase below the boiling point.
Electrochemistry & RedoxGlass Electrode
An ion-selective electrode whose thin glass membrane develops a potential proportional to the pH of the solution.
Organic ChemistryGrignard Reagent
An organomagnesium halide that acts as a source of a carbanion-like nucleophilic carbon.
Acids, Bases & SaltsHenderson–Hasselbalch Equation
The equation giving the pH of a buffer from the pKa of its acid and the ratio of conjugate base to acid.
Chemical Kinetics & CatalysisHeterogeneous Catalysis
Catalysis in which the catalyst is in a different phase from the reactants, usually a solid with gaseous or liquid reagents.
Chemical EquilibriumHeterogeneous Equilibrium
An equilibrium involving species present in more than one phase.
Foundations of ChemistryHeterogeneous Mixture
A mixture in which the components remain physically distinct, so composition varies from one region of the sample to another.
States of Matter & Gas LawsHexagonal Close Packing
A close-packed arrangement in which layers of spheres repeat in an ABAB sequence.
Chemical Kinetics & CatalysisHomogeneous Catalysis
Catalysis in which the catalyst is in the same phase as the reactants.
Chemical EquilibriumHomogeneous Equilibrium
An equilibrium in which all the reacting species are present in the same phase.
Inorganic & Coordination ChemistryHydrate Isomerism
Isomerism arising from water molecules occupying either the coordination sphere or lattice positions outside it.
Acids, Bases & SaltsIndicator Range
The span of pH over which an indicator's colour visibly changes, roughly one unit either side of its pKa.
States of Matter & Gas LawsInterstitial Void
An empty space between the packed spheres of a crystal lattice, capable of hosting a smaller ion or atom.
Inorganic & Coordination ChemistryIonisation Isomerism
Isomerism arising when an anion inside the coordination sphere exchanges places with the counter ion outside it.
Biochemistry & Polymer ChemistryIsoelectric Point
The pH at which a molecule carries no net electrical charge.
Electrochemistry & RedoxLithium-Ion Battery
A rechargeable cell in which lithium ions shuttle between a graphite anode and a metal oxide cathode.