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Vocabular pentru IELTS Academic (Scor 8-9) - Chemistry

Aici veți învăța câteva cuvinte în limba engleză legate de chimie care sunt necesare pentru examenul Academic IELTS.

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Vocabulary for Academic IELTS (8)
solute
[substantiv]

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

solut, substanță dizolvată

solut, substanță dizolvată

Ex: Dissolving a pain reliever ( e.g. , aspirin ) in water results in the drug acting as solute in the liquid solvent .
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reactant
[substantiv]

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

reacție, reacțant

reacție, reacțant

Ex: When iron reacts with sulfur , reactants are iron and sulfur .
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catalyst
[substantiv]

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

catalizator, catalizatoare

catalizator, catalizatoare

Ex: In the Haber process , iron is used as catalyst to promote the synthesis of ammonia from nitrogen and hydrogen gases .
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catalysis
[substantiv]

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

cataliză, catalizator

cataliză, catalizator

Ex: Zeolites act as catalysts in refining processes , promoting catalysis of hydrocarbons into valuable products .
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covalent bond
[substantiv]

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

legătură covalentă, bond covalent

legătură covalentă, bond covalent

Ex: The air 's like a molecular community , held together covalent bonds, forming a breathable atmosphere .
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isomer
[substantiv]

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

izomer, izomere

izomer, izomere

Ex: The amino acid isoleucine and the sugar maltose are examples isomers with identical molecular formulas but differing chemical structures .
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polymer
[substantiv]

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

polimer, macromoleculă

polimer, macromoleculă

Ex: Polyester is a versatile polymer used in fabrics , clothing , and plastic bottles .
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monomer
[substantiv]

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

monomer, monomeră

monomer, monomeră

Ex: Styrene is monomer used in the production of polystyrene , a common plastic and insulation material .
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hydrocarbon
[substantiv]

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

hidrocarbură, compus hidrocarbonat

hidrocarbură, compus hidrocarbonat

Ex: Benzene (C₆H₆) is an aromatic hydrocarbon, exhibiting a ring structure with alternating single and double bonds.
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ester
[substantiv]

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

ester, esteri

ester, esteri

Ex: Ethyl propionate is ester with a fruity odor and is used as a flavoring agent in the food industry .
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aldehyde
[substantiv]

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

aldehidă, aldehidă

aldehidă, aldehidă

Ex: Formaldehyde is a aldehyde used in various industrial applications , including the production of resins .
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alcohol
[substantiv]

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

alcool, alcoolic

alcool, alcoolic

Ex: alcohol is used in the production of fragrances , flavorings , and as a solvent in various applications .
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ketone
[substantiv]

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

cetona, ketonă

cetona, ketonă

Ex: Camphor is ketone found in various plant sources and used in medicinal and flavoring applications .
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a chemical reaction where electrons are transferred between substances

reacție de oxidare-reducere, reacție redox

reacție de oxidare-reducere, reacție redox

Ex: Photosynthesis is a biological process that involves oxidation-reduction of water and carbon dioxide to produce glucose and oxygen .
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molarity
[substantiv]

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

molaritate, concentrație molară

molaritate, concentrație molară

Ex: Hydrogen peroxide with molarity of 6 M means there are 6 moles of H₂O₂ per liter .
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electrolyte
[substantiv]

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

electrolit, electrolit ionic

electrolit, electrolit ionic

Ex: Acetic acid (CH₃COOH) is a weak electrolyte, producing acetate ions (CH₃COO⁻) and hydrogen ions (H⁺) in solution.
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enthalpy
[substantiv]

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

entalpie, conținut termic

entalpie, conținut termic

Ex: Enthalpy plays a role in the analysis of reaction spontaneity , where negative ΔH values often indicate spontaneous processes .
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entropy
[substantiv]

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

entropie, grad de dezordine

entropie, grad de dezordine

Ex: Dissolving a solute in a solvent generally increases entropy of the system .
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colloid
[substantiv]

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

coloid, amestec coloidal

coloid, amestec coloidal

Ex: Blood plasma is colloid with proteins and other substances dispersed in water .
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corrosion
[substantiv]

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

corozie, corodare

corozie, corodare

Ex: Exposure to moisture accelerates corrosion.
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alkali
[substantiv]

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

alcaliu, substanță alcalină

alcaliu, substanță alcalină

Ex: Alkalis are often used in the production of soaps, detergents, and other cleaning agents due to their ability to dissolve fats and oils.
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Vocabular pentru IELTS Academic (Scor 8-9)
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