The Mole

Question 1

The Mole

Answer 1

The amount of substance, expressed in grams (g per mole) which contains as many elementary particles as there are in 12g pf the carbon-12 isotype

Question 2

Molar Mass

Answer 2

Mass in grams of one mole of a certain substance

Question 3

Avogadro Number

Answer 3

The number of atoms or molecules present in one mole of a substance equal to 6,022 X 10^23 elementary particles

Question 4

Molar Volume

Answer 4

The volume occupied by 1 mole of any gas at standard temperature and pressure is 22.4dm^3.mol^-1

Question 5

Solution

Answer 5

A homogeneous mixture of solute and solvent

Question 6

Solute

Answer 6

The substance that is dissolved in the solution

Question 7

Solvent

Answer 7

The substance in which another substance is dissolved, forming a solution

Question 8

Concentration

Answer 8

The amount of solute per unit volume of solvent

Question 9

Aqueous Solution

Answer 9

If the solvent used is water, the solution is known as an aqueous solution

Question 10

Dissociation

Answer 10

Ionic substances dissociate when dissolved in water to form an aqueous solution

Question 11

Ionisation

Answer 11

Ionisation takes place when a covalent compound dissolves in water. The covalent molecules break up to form ions in the solution.

Question 12

Limiting Reagent

Answer 12

The substance used up first in a chemical reaction