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Year 9 Chemistry > Reactions Part 1 > Flashcards

Reactions Part 1 Flashcards

1
Q

Which percentage of air is oxygen gas?

A

21%

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2
Q

Name three uses of oxygen gas.

A

Welding torches

Rocket fuel

Breathing apparatus

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3
Q

Give the general word for combustion.

A

fuel + oxygen –> carbon dioxide + water + energy

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4
Q

Give the word equation for respiration

A

glucose + oxygen –> carbon dioxide + water + energy

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5
Q

Give the word equation for rusting

A

iron + oxygen + water –> hydrated iron oxide

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6
Q

Which chemicals are required to prepare oxygen gas?

A

Hydrogen peroxide and manganese dioxide

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7
Q

Give the word equation for the decomposition of hydrogen peroxide to form oxygen gas.

A

manganese dioxide

hydrogen peroxide ⇒ oxygen + water

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8
Q

Label the apparatus A-F for the preparation of oxygen gas.

A

A - Side arm test tube B - Delivery tube C- Oxygen gas D - Trough E - Hydrogen peroxide + manganese dioxide F -Clamp

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9
Q

What is a catalyst?

A

A chemical which speeds up a chemical reaction without being used up itself.

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10
Q

What is the name of the catalyst used in the preparation of oxygen gas?

A

Manganese dioxide

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11
Q

Name another catalyst

A

Enzymes

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12
Q

Give three uses of carbon dioxide gas

A

Fire extinguishersDry IceFizzy Drinks

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13
Q

Give the general word equation for the production of carbon dioxide gas.

A

metal carbonate + acid ⇒ salt + water + carbon dioxide

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14
Q

Give a word equation for the chemicals used to make carbon dioxide gas

A

calcium carbonate + hydrochloric acid ⇒ calcium chloride + water + carbon dioxide

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15
Q

Label the apparatus A-E for the preparation of carbon dioxide gas.

A

A - side arm test tube B - bung C - downward delivery tube D - limewater E - marble chips (calcium carbonate ) + acid

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16
Q

What is the test for carbon dioxide gas?

A

Bubble through limewater, it turns cloudy.

17
Q

Give three uses of hydrogen gas

A

Rocket fuelClean fuel for carsMargarine

18
Q

Label the apparatus A - F for the preparation of hydrogen gas

A

A - retort stand B - bung C - clamp D - test tube E - upward delivery tube F - side arm test tube

19
Q

Give the general word equation for the preparation of hydrogen gas.

A

Metal + Acid ⇒Salt + Hydrogen

20
Q

Give the word equation for the chemicals used to make hydrogen gas.

A

magnesium + hydrochloric acid ⇒ magnesium chloride + hydrogen

21
Q

What is the test for hydrogen gas?

A

Lighted splint, squeaky pop!

22
Q

What does exothermic mean?

A

Gives out heat

23
Q

What does endothermic mean?

A

Takes in heat

24
Q

What does REDOX mean?

A

Reduction and Oxidation taking place in a chemical reaction

25
Q

In the following reaction which substance has been oxidised and which has been reducedmagnesium oxide + sodium ⇒ sodium oxide + magnesium

A

Magnesium oxide is reducedSodium is oxidised

Year 9 Chemistry (8 decks)

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