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GCSE Chemistry paper 1 > Acis And Alkalis definition > Flashcards

Acis And Alkalis definition Flashcards

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1
Q

Acidic

A

Containing or having the properties of an acid

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2
Q

Acidity

A

The amount of acid in a solution

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3
Q

Alkali

A

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

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4
Q

Alkaline

A

Having a PH more than 7

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5
Q

Aqueous solution

A

A solution with water as the solvent

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6
Q

Alkalinity

A

The amount of alkali in a solution

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7
Q

Concentration

A

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

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8
Q

Indicator

A

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

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9
Q

Neutral

A

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

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10
Q

PH scale

A

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

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11
Q

Universal indicator

A

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

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12
Q

Acid

A

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

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13
Q

Concentrated

A

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

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14
Q

Dilute

A

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

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15
Q

Dissociate

A

To split up or separate into different parts

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16
Q

PH metre

A

Electronic device used to measure the pH of a solution

17
Q

Strong acid

A

An acidic solute that dissociates compleatly into ions when it dissolves

18
Q

Weak acid

A

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

19
Q

Base

A

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

20
Q

Crystallisation

A

The process of forming crystals

21
Q

Filter

A

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

22
Q

Neutralise

A

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

23
Q

Salt

A

An ionic compound produced by a neutralisation reaction

24
Q

State symbols

A

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)

25
Q

Alkali

A

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

26
Q

Balanced equation

A

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

27
Q

Burette

A

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

28
Q

End-point

A

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

29
Q

Pipette

A

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

30
Q

Titration

A

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

31
Q

Effervescence

A

Fizzing or a stream of bubbles produced during a reaction

32
Q

Half equation

A

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

33
Q

Ionic equation

A

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

34
Q

Oxidation

A

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

35
Q

Reactivity series

A

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

36
Q

Reduction

A

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

37
Q

Spectator ions

A

These are ions that do not change during reaction

38
Q

Precipitate

A

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

39
Q

Precipitate

A

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

GCSE Chemistry paper 1 (7 decks)

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