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year 10 science > chemical reactions vocab > Flashcards

chemical reactions vocab Flashcards

1
Q

what is a catalyst?

A

a substance that increases the rate of a reaction but is not used up in the reaction

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2
Q

what is the collision theory?

A

the collision theory states that the particles involved in a chemical reaction must collide in order to react

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3
Q

combustion reaction

A

a reaction that involves oxygen and releases light and heat energy

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4
Q

concentrated acid

A

this refers to an acid solution with a high concentration of hydrogen ions

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5
Q

concentration

A

the number of active molecules in a set volume of solution

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6
Q

decomposition reaction

A

a reaction that involves the breakdown of a compound into simpler substances

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7
Q

dilute

A

a small number of active molecules (such as acid) in a solution

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8
Q

hydrocarbon

A

a molecule that contains only carbon and hydrogen atoms

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9
Q

monomer

A

a small molecule from which polymers are made

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10
Q

neutralisation reaction

A

a reaction in which an acid and a base combine to produce a metal, salt and water

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11
Q

oxidation reaction

A

a reaction that involves the combination of oxygen with a fuel or metal

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12
Q

polymer

A

a long-chain molecule formed by joining many smaller repeating molecules (monomers)

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13
Q

precipitate

A

an insoluble compound formed in a precipitation reaction

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14
Q

precipitation reaction

A

a reaction used to produce solid products from solutions of ionic substances

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15
Q

reaction rate

A

how fast or slow a reaction proceeds

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16
Q

solution

A

a mixture of a solute dissolved in a solvent such as water

17
Q

synthesis reaction

A

a reaction that involves the building up of compounds by combining simpler substances, normally elements

18
Q

strong acid

A

an acid which most of its molecules release hydrogen ions into solution

19
Q

spectator ion

A

an ion that does not take part in a chemical reaction

20
Q

strength

A

a strong acid readily releases a hydrogen ion in a chemical reaction; can also be used to describe the bond between different atoms

21
Q

law of conservation of mass

A

in a chemical reaction, mass is neither created nor destroyed

year 10 science (3 decks)

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