Moles and Equations definitions

Question 1

Amount of substance

Answer 1

The amount of substance is the quantity whos unit is a mole.

Question 2

Mole

Answer 2

The amount of any substance contatining as many particles as there are carbon atoms in exactly 12g of carbon 12 isotope.

Question 3

Avogadros constant

Answer 3

The number of atoms per mole of carbon 12 isotope 6.02 x 10^23 mol

Question 4

Molar mass

Answer 4

Molar mass is the mass per mole of a substance, given in g/mol.

Question 5

Empirical formula

Answer 5

Is the simplest whole number ratio of the atoms of each element in a compound.

Question 6

Molecular formula

Answer 6

The actual number of atoms of each element in a molecule.

Question 7

Anhydrous

Answer 7

A substance containing no water molecules.

Question 7

Anhydrous

Answer 7

A substance containing no water molecules.

Question 8

Hydrated

Answer 8

Crystalline and containing water molecules.

Question 8

Hydrated

Answer 8

Crystalline and containing water molecules.

Question 9

Water of crystallisation

Answer 9

Water molecules that form an essential part of the crystalline structure of a compound.

Question 9

Water of crystallisation

Answer 9

Water molecules that form an essential part of the crystalline structure of a compound.

Question 10

Molar gass volume

Answer 10

The volume per mole of gas, units are dm^3 mol^-1

Question 10

Molar gass volume

Answer 10

The volume per mole of gas, units are dm^3 mol^-1

Question 11

Solute

Answer 11

The material which dissolves

Question 11

Solute

Answer 11

The material which dissolves

Question 12

Solvent

Answer 12

The liquid it dissovles in

Question 12

Solvent

Answer 12

The liquid it dissovles in

Question 13

Solution

Answer 13

The mixture which results from dissovling a solute in a solvent.

Question 13

Solution

Answer 13

The mixture which results from dissovling a solute in a solvent.

Question 14

Concentration

Answer 14

The amount of solute,in mol, per 1dm^3 of solution.

Question 14

Concentration

Answer 14

The amount of solute,in mol, per 1dm^3 of solution.

Question 15

Standard solution

Answer 15

A standard solution is one of known concentration.

Question 15

Standard solution

Answer 15

A standard solution is one of known concentration.

Question 16

Concentrated

Answer 16

A large amount of solute(in mol) per dm^3 of solution.

Question 16

Concentrated

Answer 16

A large amount of solute(in mol) per dm^3 of solution.

Question 17

Dilute

Answer 17

A small amount of solute(in mol) per dm^3 of solution.

Question 17

Dilute

Answer 17

A small amount of solute(in mol) per dm^3 of solution.

Question 18

Indicators for titrations

Answer 18

Methyl orange, phenolphthalein, bromothymol

Question 18

Indicators for titrations

Answer 18

Methyl orange, phenolphthalein, bromothymol

Question 19

Pippete

Answer 19

Used to measure very small volumes of solutions.

Question 19

Pippete

Answer 19

Used to measure very small volumes of solutions.For like solutions of 25^3

Question 20

Volumetric flask

Answer 20

Used because this is the standad, accurate apparatus for making up standard solution.

Question 20

Volumetric flask

Answer 20

Used because this is the standad, accurate apparatus for making up standard solution. For like solutions of 250cm^3