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Year 9 Chemistry > Topic 2- Reactions > Flashcards

Topic 2- Reactions Flashcards

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1
Q

List 3 uses of oxygen

A
  1. Breathing in hospitals
  2. Rocket fuel
  3. Used in medicine
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2
Q

What is the word equation for respiration?

A

Oxygen>sugar>carbon dioxide+water>energy

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3
Q

Name 2 products of the reaction when candle wax combusts

A

Carbon dioxide + water

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4
Q

What is the word equation for oxygen?

A

Hydrogen peroxide magnesium dioxide

——————> water + oxygen

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5
Q

Test for oxygen

A

Relights a glowing splint

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6
Q

What is a catalysts?

A

A catalyst is a chemical that speeds up a reaction without being used up itself

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7
Q

What is an enzyme?

A

Enzymes are soluble protein molecules that speed up chemical reactions in cells

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8
Q

Name 3 chemical reactions that enzymes are involved in

A

Reparation
Photosynthesis
Making new proteins

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9
Q

What is the equation for preparation of hydrogen?

A

Magnesium + hydrochloric acid –> magnesium chloride + hydrogen

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10
Q

What are the chemicals required for the preparation of hydrogen?

A

Magnesium and hydrochloric acid

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11
Q

Test for hydrogen

A

Lit splint- you will hear a squeaky pop

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12
Q

Preparation of carbon dioxide

A

Calcium carbonate + hydrochloric acid –> calcium chloride + water + carbon dioxide

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13
Q

Chemicals required for preparation of carbon dioxide

A

Hydrochloric acid and marble chips

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14
Q

Test for carbon dioxide

A

Lime water turns milky

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15
Q

Give 3 uses for carbon dioxide

A

Fizzy drinks
Fire extinguisher
Dry ice

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16
Q

What is an exothermic reaction?

A

A reaction that gives out hear

17
Q

What is an endothermic reaction?

A

A reaction that takes in heat

18
Q

What is oxidation

A

The addition of oxygen

19
Q

What is Reduction?

A

Removal of oxygen

20
Q

What is a Redox reaction

A

Reduction and oxidation both taking place in a reaction

21
Q

What colour is copper oxide

A

Black powder

22
Q

What colour is carbon?

A

Black powder

23
Q

Give 3 physical properties of oxygen

A
  1. Colourless
  2. Odourless
  3. Not very soluble

Year 9 Chemistry (2 decks)

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