2C - Moles definitions Flashcards Preview

AS Chemistry > 2C - Moles definitions > Flashcards

Flashcards in 2C - Moles definitions Deck (11):
1

Amount of a substance

The quantity

Unit = Mole

2

Mole

The amount of any substance containing as many particles as there are in exactly 12g of the Carbon-12 isotope

3

Avogadro's constant

(NA)

The number of atoms per mole of the Carbon-12 isotope

 

6.02 x 1023

4

Molar mass

Mass per mle of a substance.

Unit = g/mol (g mol-1)

5

Empirical formula

The simplest whole-number ratio of atoms of each element present in a compound

6

Molecular formula

The actual number of atoms of each element in a compound

7

1-Anhydrous

2-Hydrated

1-A substance containing NO water molecules

2-A substance containing water molecules

8

Water of crystallisation

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

9

Concentration

The amount of solute, in mol per 1 dm3 of solution

10

Standard solution

When are they used?

A solution of known concentration.

Standard solutions are normally used in titrations to determine unknown information about another substance.

11

1-Solute

2-Solvent

3-Solution

1-The solid that dissolves

2-the liquid that the solute dissolves into

3-A solute dissolved into a solvent