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Year 8 Science > C4 Acids and Alkalis > Flashcards

C4 Acids and Alkalis Flashcards

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1
Q

Acids

A

A substance with a pH less than 7; they neutralise alkalis.

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2
Q

Alkalis

A

A substance with a pH greater than 7; they neutralise acids and their bases will dissolve in water

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3
Q

Bases

A

Substances that neutralise acids. Some bases dissolve in water to form alkalis.

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4
Q

Catalysts

A

Substances that speed-up reactions or help reactions take place.

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5
Q

Chloride

A

A substance that contains chlorine ions bonded to metal ions.

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6
Q

Dilute

A

To add water to acid or alkali to reduce the number acid or alkali molecules in a particular volume.

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7
Q

Harmful

A

Describes a substance as dangerous to life.

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8
Q

Hazard Symbols

A

Labels on chemical containers warning about the ways the chemical can be dangerous.

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9
Q

Hydrochloric Acid

A

A strong acid formula HCl with molecules formed from hydrogen and chlorine ions.

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10
Q

Indicator

A

Chemicals that change colour depending on the pH.

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11
Q

Neutral

A

Describes a solution with a pH of 7.

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12
Q

Neutralise / Neutralisation

A

To react an acid with an alkali to produce a neutral solution containing a salt.

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13
Q

Nitrate

A

Substance formed when nitric acid reacts with a metal.

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14
Q

Nitric Acid

A

A strong acid; formula HNO3 with molecules containing hydrogen, nitrogen and oxygen.

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15
Q

pH

A

A scale used to measure the strength of acids and alkalis.

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16
Q

Salt

A

Generally an ionic compound containing metal and non-metals ions; produced by a reaction of an acid and an alkali.

17
Q

Sour taste

A

Taste caused by acids.

18
Q

Sulphate

A

A substance formed when sulphuric acid reacts with metal.

19
Q

Sulphuric Acid

A

A strong acid formula H2SO4; with molecules containing hydrogen, sulphur and oxygen atoms.

20
Q

Universal Indicator

A

A mixture of different dies that change colour depending on pH.

Year 8 Science (1 decks)

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