Results for “pH”
291 terms · page 8 of 13
Markovnikov's Rule
In the addition of a protic acid to an unsymmetrical alkene, the hydrogen attaches to the carbon already bearing more hydrogens.
Solutions & Colligative PropertiesMole Fraction
The ratio of the moles of one component to the total moles of all components in a mixture.
Stoichiometry & Chemical ReactionsMolecular Equation
A chemical equation in which all reactants and products are written as complete, undissociated formulae.
Biochemistry & Polymer ChemistryMonosaccharide
The simplest carbohydrate, which cannot be hydrolysed into smaller sugar units.
Electrochemistry & RedoxNernst Equation
The equation relating a cell's potential to the concentrations of the species involved.
Acids, Bases & SaltsNeutral Solution
A solution in which the concentrations of hydrogen and hydroxide ions are exactly equal.
Atomic Structure & PeriodicityNode
A region within an orbital where the probability of finding an electron falls to zero.
Nuclear & RadiochemistryNuclear Cross Section
A measure of the probability that a particular nuclear reaction will occur between a nucleus and an incident particle.
Biochemistry & Polymer ChemistryNucleic Acid
A biopolymer of nucleotides that stores and transmits genetic information.
Nuclear & RadiochemistryNuclide
A distinct species of atom characterised by a specific number of protons and neutrons in its nucleus.
Organic ChemistryOptical Isomerism
Stereoisomerism in which molecules are non-superimposable mirror images and rotate plane-polarised light in opposite directions.
States of Matter & Gas LawsPacking Efficiency
The percentage of the total volume of a unit cell that is actually occupied by the constituent particles.
Solutions & Colligative PropertiesParts per Million
A concentration unit expressing one part of solute per million parts of solution by mass or volume.
Nuclear & RadiochemistryPenetrating Power
The depth to which a given type of radiation can travel into a material before being absorbed.
Stoichiometry & Chemical ReactionsPercentage Purity
The proportion of a sample that consists of the desired compound, expressed as a percentage of the total mass.
Stoichiometry & Chemical ReactionsPercentage Yield
The actual yield expressed as a percentage of the theoretical yield.
Acids, Bases & SaltspKa
The negative logarithm of the acid dissociation constant, giving a convenient scale of acid strength.
Acids, Bases & SaltspOH
The negative logarithm of the hydroxide ion concentration.
Nuclear & RadiochemistryPositron Emission
Radioactive decay in which a proton converts into a neutron, emitting a positron and a neutrino.
Chemical EquilibriumPressure Equilibrium Constant
The equilibrium constant for a gaseous reaction expressed in terms of partial pressures.
Biochemistry & Polymer ChemistryPrimary Structure
The linear sequence of amino acids in a polypeptide chain.
Inorganic & Coordination ChemistryPrimary Valence
In Werner's theory, the ionisable valence of a metal, equal to its oxidation state and satisfied by negative ions.
Acids, Bases & SaltsProton Affinity
The energy released when a gaseous species accepts a proton, measuring intrinsic basicity free of solvent effects.
Foundations of ChemistryPurity
The mass fraction of the desired substance in a sample, usually expressed as a percentage of the total mass.