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Year 11 Chemistry > Module 3: Reactive Chemistry > Flashcards

Module 3: Reactive Chemistry Flashcards

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1
Q

What is a chemical change?

A

When a new substance is formed and bonds are broken and formed

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2
Q

What is a physical change?

A

When there is a change in property but no new products are formed

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3
Q

What are four signs of chemical change?

A
  • Colour change
  • Significant temperature change
  • Formation of precipitate in a solution
  • Production of gas/bubbles
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4
Q

What does conservation of atoms mean?

A

No atoms are created or destroyed, therefore mass of products must equal mass of reactants

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5
Q

What is a synthesis reaction?

A

Involves forming a compound from elements or from other, usually smaller compounds

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6
Q

What is a decomposition reaction?

A

Is a reaction in which one reactant is broken down into two or more products

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7
Q

What is thermal decomposition?

A

When heat is used for decomposition reactions

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8
Q

What is electrolysis?

A

When electricity is used for decomposition reactions

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9
Q

What is photolysis?

A

When light energy is used for decomposition reactions

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10
Q

What is a combustion reaction?

A

It is the combustion of a hydrocarbon and is an oxidation and exothermic reaction

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11
Q

What are the three key elements of combustion?

A
  1. Fuel
  2. Oxygene
  3. Energy
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12
Q

What is complete combustion?

A

Combustion which occurs when there is plenty of oxygen

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13
Q

What is produced in complete combustion?

A

carbon dioxide and water

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14
Q

What is incomplete combustion?

A

Combustion which occurs when there is limited oxygen

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15
Q

What is produced in incomplete combustion?

A

carbon monoxide + water
carbon (solid) + water
carbon monoxide + carbon (solid) + water

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16
Q

What is a precipitation reaction?

A

When an insoluble compound is formed when two clear solutions are mixed

17
Q

What is a precipitate?

A

The solid formed in a precipitation reaction

18
Q

What are spectator ions?

A

Ions which are not used to form the precipitate and will start aqueous and remain aqueous

19
Q

What is an ionic equation?

A

A chemical equation which does not include spectator ions

20
Q

What does SNAAP stand for?

A

Sodium
Nitrate
Ammoniam
Acetate
Potassium

21
Q

What is the equation for acid and base reactions?

A

Acid + Base –> Salt + Water

22
Q

What is the equation for acid and carbonate reactions?

A

Acid + Metal Carbonate –> Salt + Carbon Dioxide + Water

23
Q

What is the equation for acid and metal reastions?

A

Acid + Metal –> Salt + Hydrogen Gas

24
Q

What food did indigenous people detoxifying using chemical reactions?

A

Cycad fruit

25
Q

What were the two ways cycads were detoxified?

A

Leaching - soaking poisons out
Fermentation - leaving the fruit in a moist environment for months

26
Q

What happens when metal reacts with oxygen?

A

An electron is transferred from metal atoms to oxygen atoms

27
Q

What is the formula for the reaction between oxygen and metal?

A

metal + oxygen –> metal oxide

28
Q

What happens when metal reacts with water?

A

Some metals displace hydrogen and hydroxide or metal oxide

29
Q

When is metal oxide formed when water reacts with metal?

A

When the metal has a low reactivity such as aluminium zinc or iron and only reacts with steam

30
Q

When will a reaction between metals and other metallic ions occur?

A

When the solid metal is more reactive than the metal ions in the solution

31
Q

Methane

A

CH4

32
Q

Ethanol

A

C2H5OH

Year 11 Chemistry (2 decks)

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