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Yr9 Chemistry > halfterm 3 - term 2 test > Flashcards

halfterm 3 - term 2 test Flashcards

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1
Q

Examples of strong acids are

A

Hydrochloric acid, nitric acid and sulfuric acid

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2
Q

Examples of metals that react with acid

A

Magnesium, iron, zinc

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3
Q

Metal + acid -> …

A

Salt + hydrogen

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4
Q

What is the test for hydrogen

A

Squeaky pop

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5
Q

What is the formula for hydrochloric acid

A

HCl

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6
Q

The formula sulfuric acid

A

H2 SO4

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7
Q

Formula of nitric acid

A

HNO3

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8
Q

Methods of finding if something is acid or alkali

A

Litmus paper and pH scale(universal indicator)

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9
Q

Colour meaning for litmus paper

A

Blue + blue = alkali
Red + red = acid
Red + blue = neutral

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10
Q

Colour and number meaning for universal indicator (pH scale)

A

1-6 = acid (red - yellow)
7 = neutral (Green)
8-14 = alkali (blue-purple)

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11
Q

Why is universal indictor better than litmus paper

A

It is a more exact measurement

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12
Q

Examples of alkalis

A

Sodium hydroxide, potassium hydroxide

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13
Q

Alkalis contain … ions (…)

A

Hydroxide (OH-)

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14
Q

Acids contain … ions (…)

A

Hydrogen (H+)

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15
Q

Salt made with hydrochloric acids makes a..

A

Chloride

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16
Q

Salt made with nitric acid makes a..

A

Nitrate

17
Q

Salt made with sulfuric acid makes a..

A

Sulfate

18
Q

Acid + alkali ->

A

Salt + water

19
Q

Example of a acid + alkali reaction (neutralisation)

A

Hydrochloric acid + sodium hydroxide-> sodium chloride + water

20
Q

What is neutralisation

A

(Acid + alkali reaction) when the acid and alkali cancel each other out so the product is neither acid or alkali and is in the middle (pH 7)

21
Q

acid + base ->

A

salt + water (neutralisation)

22
Q

Acid + carbonate ->

A

salt + water + carbon dioxide

23
Q

Example of acid + carbonate reaction

A

Sulfuric acid + sodium carbonate -> sodium sulfate + water + carbon dioxide

24
Q

Test for carbon dioxide is..

A

Limewater turning milky/cloudy in the presence of carbon dioxide

25
Q

What is a base

A

Insoluble version of an alkali

Yr9 Chemistry (3 decks)

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