3A - The Periodic Table definitions Flashcards Preview

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Flashcards in 3A - The Periodic Table definitions Deck (14):
1

Alkali 

A type of base that dissolves in water forming hydroxide ions

2

Alkaline

A term used to describe a solution containing hydroxide ions

3

Alkaline earth metals

Group 2 metals. 

Metals that don't occur in their elemental form naturally. They're found in stable compounds e.g. calcium carbonate for Ca

4

Alkalinity

A measure of the concentration of hydroxide ions present in an alkaline solution

 

Units = moldm-3

5

pH

A measure of the concentration of H+ ions present in a solution

6

Solubility

A measure of the ability of a solute to dissolve in a solvent.

 

Often expressed in moldm-3. This represents the maximum number of moles of a solute able to dissolve in 1dm3 of water.

7

Anion

A negatively charged ion with more electrons than protons

8

Base

A compound that neutralisaes an acid to form a salt

9

Cation

A positively charged ion with fewer electrons than protons

10

Disproportionation

A redox reaction in which the same element is both oxidised and reduced

11

Intermolecular force

An attractive force between molecules.

Intermolecular forces can be london forces, permanent dipole-dipole interactions or hydrogen bonding.

12

Oxidation

Loss of electrons or an increase in oxidation number

13

Reduction

Gain of electrons or a decrease in oxidation number

14

Redox

A reaction involving reduction and oxidation