Chemistry vocabulary

Question 1

what does the term ‘ Activation energy’ mean?

Answer 1

-The minimum energy needed for a reaction to occur.

Question 2

what does the term ‘Aqueous’ mean?

Answer 2

-Dissolved in water.

Question 3

what does the term ‘Chemical kinetics’ mean?

Answer 3

-The study of the rates of chemical reactions

Question 4

what does the term ‘Catalyst’ mean?

Answer 4

• A substance that speeds up a chemical reaction but is chemically unchanged at the end. They work by providing an alternate reaction pathway with a lower activation energy.

Question 5

what does the term ‘Collision theory’ mean?

Answer 5

• Theory that describes how chemical reactions occur through molecular collisions and why reaction rates vary between reactions.

Question 6

what does the term ‘Concentration’ mean?

Answer 6

• A measure of how much solute is dissolved in a specific amount of solvent or solution (usually measured in mol dm-3)

Question 7

what does the term ‘Enzyme’ mean?

Answer 7

• A biological molecule that catalyses a biological reaction.

Question 8

what does the term ‘Excess’ mean?

Answer 8

• Preventing a substance from becoming a limiting reagent by deliberately adding too much ofit so that there is some regent remaining unreacted.

Question 9

what does the term ‘Intermediate’ mean?

Answer 9

• A species the is produced in one step and consumed in another step of a chemical reaction.

Question 10

what does the term ‘Maxwell-Boltzmann curve’ mean?

Answer 10

• A graph that shows the number of molecules and their energies at specific temperature.

Question 11

what does the term ‘Molarity’ mean?

Answer 11

-The number of moles of solute dissolved per dm-3 of solution; also known as molar concentration.

Question 12

what does the term ‘Molecule’ mean?

Answer 12

• A group of atoms chemically joined together.

Question 13

what does the term ‘Rate of reaction’ mean?

Answer 13

• Change in the concentration of a reactant or product per unit time.

Question 14

what does the term ‘reaction mechanism’ mean?

Answer 14

• A series of reaction steps that convert reactants into products in a chemical reaction.

Question 15

what does the term ‘solute’ mean?

Answer 15

• One or more substance dissolved in a solution.

Question 16

what does the term ‘Solvent’ mean?

Answer 16

• The substances dissolved in a solution.

Question 17

what does the term ‘solution’ mean?

Answer 17

• A uniform mixture that can contain solids, liquids or gases dissolved in a liquid.

Question 18

what does the term ‘Species’ mean?

Answer 18

• Any set of chemically identical substances.