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Terms starting with C

106 terms · page 3 of 5


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Biochemistry & Polymer Chemistry

Coenzyme

A small organic molecule that binds temporarily to an enzyme and is essential for its catalytic activity.

Dimensionless
Biochemistry & Polymer Chemistry

Cofactor

A non-protein chemical component required for an enzyme to function.

Dimensionless
Solutions & Colligative Properties

Colligative Properties

Solution properties that depend only on the number of dissolved solute particles, not on their chemical identity.

Various
Chemical Kinetics & Catalysis

Collision Frequency

The number of collisions occurring per unit volume per unit time in a reacting mixture.

Z ∝ n²σ√T s⁻¹
Chemical Kinetics & Catalysis

Collision Theory

The model that explains reaction rates in terms of the frequency, energy and orientation of collisions between reacting particles.

rate = pZ e^(−Ea/RT) mol/(L·s)
Solutions & Colligative Properties

Colloid

A heterogeneous mixture in which particles between 1 and 1000 nm are dispersed through a continuous medium.

nm
Analytical Chemistry & Spectroscopy

Column Chromatography

A preparative technique in which a mixture is separated by passing it down a vertical column packed with stationary phase.

g
Stoichiometry & Chemical Reactions

Combination Reaction

A reaction in which two or more substances unite to form a single product.

A + B → AB Dimensionless
States of Matter & Gas Laws

Combined Gas Law

The relation linking pressure, volume and temperature for a fixed amount of gas undergoing a change of state.

p₁V₁ / T₁ = p₂V₂ / T₂ Various
Chemical Equilibrium

Combining Equilibrium Constants

The rule that when two reactions are added, their equilibrium constants multiply.

K_overall = K₁ × K₂ Various
Stoichiometry & Chemical Reactions

Combustion Analysis

A technique that determines the empirical formula of an organic compound by burning it completely and weighing the CO₂ and H₂O produced.

C → CO₂, H → H₂O g
Stoichiometry & Chemical Reactions

Combustion Reaction

The rapid exothermic reaction of a substance with oxygen, usually producing heat and light.

CₓH_y + O₂ → CO₂ + H₂O kJ/mol
Chemical Equilibrium

Common Ion Effect

The suppression of the ionisation or dissolution of a substance by adding a second substance that supplies one of the same ions.

mol/L
Stoichiometry & Chemical Reactions

Complete Ionic Equation

An equation showing every soluble strong electrolyte as its separate constituent ions.

Dimensionless
Inorganic & Coordination Chemistry

Complex Ion

A charged species consisting of a central metal ion surrounded by a definite number of ligands.

[ML₆]ⁿ⁺ Dimensionless
Chemical Equilibrium

Complex Ion Equilibrium

The equilibrium between a metal ion, its ligands and the resulting complex ion in solution.

M + nL ⇌ MLₙ mol/L
Chemical Kinetics & Catalysis

Complex Reaction

An overall reaction that proceeds through two or more elementary steps.

Dimensionless
Acids, Bases & Salts

Complex Salt

A salt containing a complex ion that retains its identity in solution rather than dissociating into simpler ions.

e.g. K₄[Fe(CN)₆] Dimensionless
Analytical Chemistry & Spectroscopy

Complexometric Titration

A titration based on the formation of a stable complex between the analyte metal ion and a chelating titrant.

M²⁺ + EDTA⁴⁻ → [M(EDTA)]²⁻ mol/L
Foundations of Chemistry

Compound

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

Dimensionless
States of Matter & Gas Laws

Compressibility Factor

The ratio of the actual molar volume of a gas to that predicted by the ideal gas law.

Z = pV / nRT Dimensionless
Stoichiometry & Chemical Reactions

Comproportionation Reaction

A redox reaction in which two species of the same element in different oxidation states combine to give a single intermediate state.

A⁺ + A⁻ → 2A Dimensionless
Electrochemistry & Redox

Concentration Cell

A galvanic cell in which both electrodes are identical and the potential arises solely from a difference in concentration.

E = (0.0592/n) log(C₂/C₁) V
Chemical Equilibrium

Concentration Equilibrium Constant

The equilibrium constant expressed in terms of the molar concentrations of the species involved.

Kc = [C]^c[D]^d / [A]^a[B]^b Various