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Acids ,bases and salts > definitions and meaning > Flashcards

definitions and meaning Flashcards

1
Q

indicator

A

a chemical that gives a color change in acidic, alkaline and neutral solutions.

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2
Q

Ph meter

A

electronic device that can give a numerical value for pH, to at least one decimal place, without needing universal indicator.

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3
Q

Acid

A

a substance that dissolves in water producing hydrogen ions.

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4
Q

Strong acid

A

A strong acid ionises completely in water like hydrochloric acid.

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5
Q

Weak acid

A

A weak acid only partially ionises in water like ethanoic acid

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6
Q

Concentrated solution

A

Concentration only refers to how much of a substance is dissolved in a given volume of water. It does not account for the strength of the acid.

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7
Q

Concentrated acid

A

contains a large number of acid particles dissolved per unit volume

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8
Q

Dilute acid

A

contains a small number of acid particles dissolved per unit volume

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9
Q

Bases

A

A base is a substance that reacts with an acid to produce a salt and a water. Common bases are metal oxides and hydroxides. For example copper oxide and calcium hydroxide.

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10
Q

Alkali

A

Soluble base for example ammonia and sodium hydroxide

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11
Q

salt

A

a compound formed when some or all the hydrogen ions of an acid are replaced by metal or ammonium ions

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12
Q

Acids color

A

all acids are colorless solutions

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13
Q

All group 1 and 11, ammonium, aluminion and zinc compounds

A

white solids but they dissolve in water to form colourless solutions

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14
Q

copper oxide

A

black solid

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15
Q

copper carbonate

A

green solid

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16
Q

hydrated copper sulfate

A

blue solid

17
Q

Anhydrous copper sulfate

A

white solid

18
Q

copper compounds that are soluble

A

form blue solutions

19
Q

Endothermic

A

a reaction in which heat energy is taken in

20
Q

exothermic

A

a reaction in which heat energy is given out

21
Q

Neutralization

A

the reaction between an acid and an alkali producing a salt and water

22
Q

water of crystallization

A

water that is chemically bonded into the crystal structure

23
Q

Hydrated

A

contains water of crystallization

Acids ,bases and salts (14 decks)

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