IELTS Académique (Band 8 et Plus) - Chimie

a substance that is dissolved in a solvent, resulting in a solution

corps dissout

a substance that takes part in and undergoes a chemical reaction, leading to the formation of new products

réactif

(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself

catalyseur

the acceleration or facilitation of a chemical reaction by a substance (catalyst) that remains unchanged at the end of the reaction

augmentation de la vitesse d'une réaction chimique due au catalyseur

a chemical bond where atoms share electrons to form a stable molecule

une liaison covalente

any of two or more compounds having the same molecular formula but different arrangements of atoms and, consequently, different properties

isomère

a large molecule composed of repeating structural units, or monomers, covalently bonded together in a chain-like structure

polymère

a molecule that can chemically bond with other molecules to form a polymer

monomère

a compound composed of hydrogen and carbon atoms, with the simplest form being alkanes, alkenes, or alkynes

hydrocarbure

a chemical compound derived from the reaction between an alcohol and an organic acid, typically with the elimination of water

ester (chimie)

an organic compound with a carbonyl group (C=O) bonded to a hydrogen atom and another carbon atom, commonly found in essential oils and used in various chemical processes

aldéhyde

a compound with a hydroxyl group (-OH) attached to a carbon atom, widely used as solvents, fuels, and in pharmaceutical and chemical synthesis

alcool (chimie)

an organic compound with a carbonyl group (C=O) bonded to two carbon atoms, commonly found in solvents, pharmaceuticals, and flavorings

cétone

a chemical reaction where electrons are transferred between substances

oxydo-réduction

the concentration of a solute in a solution, measured in moles per liter (mol/L or M)

concentration molaire

a substance that, when dissolved in a solution, produces ions and enables the conduction of electric current

électrolyte

a thermodynamic quantity representing the total heat content of a system, commonly denoted as H

enthalpie

a thermodynamic measure of the degree of disorder or randomness in a system, denoted by S

entropie

a mixture where small particles of one substance are evenly dispersed in another substance, typically intermediate in size between solution and suspension particles

colloïde

the gradual destruction of materials by chemical reaction, usually of metals

corrosion

any substance with a pH of more than seven that neutralizes acids creating salt and water

alcali