Acis And Alkalis definition

Question 1

Acidic

Answer 1

Containing or having the properties of an acid

Question 2

Acidity

Answer 2

The amount of acid in a solution

Question 3

Alkali

Answer 3

A solution with a PH of more than 7 and that contains an excess of hydroxide (OH)➖ ions, alkalis turn litmus blue

Question 4

Alkaline

Answer 4

Having a PH more than 7

Question 5

Aqueous solution

Answer 5

A solution with water as the solvent

Question 6

Alkalinity

Answer 6

The amount of alkali in a solution

Question 7

Concentration

Answer 7

A measure of how much solute is dissolved in a solvent such as water. (Units h dm-3 or mol dm-3)

Question 8

Indicator

Answer 8

A substance that changes colour depending on the PH of a solution

Question 9

Neutral

Answer 9

A substance that is neither an acid nor an alkali. Neutral solutions have a PH of 7 and the same concentrations of hydrogen (h➕) and (OH➖) ions

Question 10

PH scale

Answer 10

A numerical scale up to 14 that measures the acidity or alkalinity of a solution based on the concentrations of hydrogen ions

Question 11

Universal indicator

Answer 11

An indicator containing a mixture of different PH indicators designed to produce a range of colours depending on the PH

Question 12

Acid

Answer 12

A solution with a PH of less than 7 and that contains an excess of hydrogen (h)➕ ions, acids turn litmus red

Question 13

Concentrated

Answer 13

Containing a large amount of solute dissolved in a small volume of solvent

Question 14

Dilute

Answer 14

Containing a small amount of solute dos solved in a large volume of solvent

Question 15

Dissociate

Answer 15

To split up or separate into different parts

Question 16

PH metre

Answer 16

Electronic device used to measure the pH of a solution

Question 17

Strong acid

Answer 17

An acidic solute that dissociates compleatly into ions when it dissolves

Question 18

Weak acid

Answer 18

An acidic solute that does not dissociates completely into ions when it dissolves

Question 19

Base

Answer 19

Any substance soluble or insoluble that neutralises an acid forming a salt and water only

Question 20

Crystallisation

Answer 20

The process of forming crystals

Question 21

Filter

Answer 21

To remove or separate a solid from a liquid by passing the mixture through a porous material

Question 22

Neutralise

Answer 22

To make a solution neither acidic nor alkaline. During neutralisation a base reacts with an acid, forming a salt and water

Question 23

Salt

Answer 23

An ionic compound produced by a neutralisation reaction

Question 24

State symbols

Answer 24

Standard set of symbol written after chemical formulae to indicate the state of a substance. These are solid (s) liquid (l) gas (g) and dissolved in water (aq)

Question 25

Alkali

Answer 25

A solution with a pH of more than 7 and that contains an excess of hydroxide (OH➖) ions. Alkalis turn litmus blue. A soluble base

Question 26

Balanced equation

Answer 26

A way of writing out what happens in a chemical reaction using symbols to represent the substance involved

Question 27

Burette

Answer 27

Apparatus used to accurately measure the volume of solution that has been added during a titration

Question 28

End-point

Answer 28

In a titration, when just enough solution has been added from the burette to react with a all the solution in the flask

Question 29

Pipette

Answer 29

Apparatus used to accurately measure a set volume of a solution which can be used in a titration

Question 30

Titration

Answer 30

Method used to mix acids and alkalis in the correct proportions to produce a solution containing only salt and water. It can be used to find the concentration of an acid or an alkali

Question 31

Effervescence

Answer 31

Fizzing or a stream of bubbles produced during a reaction

Question 32

Half equation

Answer 32

A balanced equation including electrons that shows what happens to one substance during a redox reaction

Question 33

Ionic equation

Answer 33

A balanced equation that only shows the ions that react together. The spectator ions are not included in the equation

Question 34

Oxidation

Answer 34

A reaction in which a substance gains oxygen or in which an atom or ion lists electrons

Question 35

Reactivity series

Answer 35

A list of metals in order of reactivity with the most reactive at the top

Question 36

Reduction

Answer 36

A reaction in which a substance loses oxygen or in which an atom or ion gains electrons

Question 37

Spectator ions

Answer 37

These are ions that do not change during reaction

Question 38

Precipitate

Answer 38

An insoluble product formed when solutions of two soluble reactions are mixed

Question 39

Precipitate

Answer 39

A reaction in which an insoluble product is formed from two soluble reactants I'm solution