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9 Chemistry > Chemical Reactions > Flashcards

Chemical Reactions Flashcards

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1
Q

What happens during a chemical reaction?

A

Old bonds break and new bonds are produced

Atoms exchange electrons with each other during chemical reactions, which can involve new configurations of atoms.

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2
Q

What are the 4 major types of reactions?

A
  1. Acid-base
  2. Combustion
  3. Corrosion
  4. Reactions of life
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3
Q

What reaction is photsynthesis?

A

Reaction of life

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4
Q

What reaction is respiration?

A

Reaction of life

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5
Q

Define corrosion

A

The oxidation of metals.

Rusting is the corrosion of iron and steel.

Occurs faster in marine environments.

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6
Q

In an acid-base chemical reaction, what happens?

A

Both the acid and base mixed will neutralise.

Neutralisation reactions produce H2O and asalt.

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7
Q

How do you write chemical reactions?

A

Reactants -> Products

E.g.
Photosynthesis
Carbon Dioxide + water -> (light) oxygen + glucose

Chemical formula:
CO2 + H2O ->(light) C6H1206

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8
Q

What is combustion?

A

An oxidation exothermic reaction

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9
Q

Combustion requires what 3 things

A
  1. Oxygen
  2. Fuel
    3.heat
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10
Q

Common fuels:

A

Fossils fuels
Wood
Sugar/carbohydrates
Fats/oils/lipids

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11
Q

Define photosynthesis

A

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

Plants use sunlight to convert carbon dioxide and water into oxygen and glucose.

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12
Q

Define respiration

A

process in living organisms involving the production of energy

Glucose reacted with oxygen in cells to produce energy, which keeps cells alive

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13
Q

Define corrosion

A

The oxidation of metals. Rusting is the corrosion of iron and steel.

Occurs faster in marine environments.

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14
Q

Define acid-bases reaction

A

Neutralisation reactions produce water and a salt

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15
Q

How to write chemical reactions

A

Reactants -> Products (reaction conditions above arrow)

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16
Q

Define exothermic reaction

A

A chemical reaction in which it releases/produces energy by light or heat

17
Q

Define endothermic reaction

A

chemical reactions in which the reactants absorb heat energy from the surroundings to form products

18
Q

Define law of conservation of energy

A

matter and energy can neither be destroyed nor created, only transformed or transferred.

19
Q

Balance this chemical equation:
P4O10 + H2O → H3PO4

A

P4O10 + 6 H2O → 4 H3PO4

20
Q

Balance:
CO2 + H2O → C6H12O6 + O2

A

6CO2 + 6H2O → C6H12O6 + 6O2

21
Q

Balance:
SiCl4 + H2O → H4SiO4 + HCl

A

SiCl4 + 4H2O → H4SiO4 + 4HCl

22
Q

Is photosynthesis exothermic or endothermic? And why?

A

Endothermic since sunlight energy is absorbed during the process of photosynthesis.

23
Q

What is the balanced equation of photosynthesis?

A

6CO2 + 6H2O -> (sunlight) C6H12O6 + 6O2

24
Q

How to write worded formula of photosynthesis?

A

Carbon dioxide + water -> (sunlight) glucose + oxygen

25
Q

What things photosynthesise?

A

Plants

Algae

Cyanobacteria

26
Q

What kind of respiration did we focus on?

A

Aerobic respiration
Process in which organisms use fuel such as fats and sugars into chemical energy

27
Q

What is the balanced chemical formula of respiration?

A

C6H12O6 + 6O2 -> 6CO2 + 6H2O

28
Q

How to write worded formula of respiration?

A

glucose + oxygen -> carbon dioxide + water

29
Q

What things respires?

A

Animals

Humans

Plants

Fungi

30
Q

What is the chemical compound when carbon dioxide dissolves in water?

A

Carbonic acid

9 Chemistry (7 decks)

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