Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Yr 9 Science > Chemistry > Flashcards

Chemistry Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Chemical reaction

A

When an old substance dissapears and a new substance forms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Old substance

A

Is known as the reactant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

New substance

A

Is known as the product

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Chemical equation

A

Reactants -> products for example Oxygen+magnesium -> magnesium oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Types of reactions

A

Combustion, Photosynthesis, Respiration, Corrosion and Fermentation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Combustion

A

Any reaction that involves burning with oxygen to release light and heat e.g burning a match

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Photosynthesis

A

Is a series of chemical reactions that uses sunlight to convert water and carbon dioxide into oxygen and glucose.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Respiration

A

A chemical reaction that converts oxygen and glucose into carbon dioxide and water vapour, respiration releases water vapour.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Corrosion

A

A chemical reaction that causes metals to react with water and oxygen e.g iron forms rust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fermentation

A

Is an anaerobic process carried out my microorganisms like yeast and bacteria, is used in food production (bread), wine) and biofuel production (ethanol)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Anaerobic

A

Without oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Aerobic

A

With oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Aq/aqueous

A

Dissolved in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Molecular compound

A

All the molecules in a compound are identical in size and shape, and have the same number of atoms. Scientists represent the molecules of a compound using a molecular formula, it describes how many of each atom make up the molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Photosynthesis Chemical equation

A

Carbon dioxide+ water -> Oxygen+ glucose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Respiration Chemical equation

A

Glucose+Oxygen -> Carbon dioxide+Water vapour+ energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Corrosion Chemical equation

A

Iron+water+oxygen-> iron oxide

18
Q

Complete combustion

A

When there is plenty of oxygen

19
Q

Equation example of complete combustion

A

Hydrocarbon (CH) + Oxygen (O2) -> Carbon Dioxide (CO2) + Water (H2O) + Soot (Carbon)

20
Q

Incomplete combustion

A

Where oxygen is limited

21
Q

Incomplete combustion example equation

A

Hydrocarbon + (Not enough oxygen O2) -> Water (H2O)+ Carbon monoxide (CO) + Soot (Carbon)

22
Q

Endothermic Reaction

A

Reactions that take in energy (heat) e.g photosynthesis (plants making sugar) photosynthesis= CO2 + H2O -> C6H12O6 (Glucose) + O2

23
Q

Combustion of Methane

A

Methane is the primary component of natural gas, which is used for heating homes and generating electricity

24
Q

Methane Combustion Word Equation

A

Methane + Oxygen -> Carbon Dioxide + Water

25
Q

Methane Combustion Symbol Equation

A

CH4+ 2O2 -> CO2 + 2H2O

26
Q

Combustion of Ethanol

A

Ethanol is commonly used as a biofuel additive in gasoline to reduce greenhouse gas emmissions

27
Q

Ethanol Combustion Word Equation

A

Ethanol + Oxygen -> Carbon Dioxide + Water

28
Q

Ethanol Combustion Symbol Equation

A

C2H5OH + 3O2 -> 2CO2+ 4H2O

29
Q

Combustion of Propane

A

Propane is used as a clean-burning fuel for residential and commercial heating, cooking and powering appliances like stove and grills

30
Q

Propane Combustion Word Equation

A

Propane + Oxygen ->Carbon dioxide+ Water

31
Q

Propane Combustion Symbol Equation

A

C3H8 + 5O2 -> 3CO2 +4H2O

32
Q

Combustion of Hydrazine

A

Hydrazine is commonly used as a rocket propellant due to its high energy content

33
Q

Hydrazine Combustion Word Equation

A

Hydrazine + Oxygen -> Nitrogen gas + Water

34
Q

Hydrazine Combustion Symbol Equation

A

N2H4 + O2 -> N2 + 2H2O

35
Q

5 signs a Chemical reaction has occurred

A

Gas being released, colour change, new smell, solid (precipitate) is formed and temperature change

36
Q

Energy change

A

When a temperature change occurs, this indicate the energy has changed forms. Energy may be needed for the reaction to occur, or it may be produced as a result of the reaction. When a reaction occurs bonds can be broken or formed

37
Q

Endothermic Reaction

A

Heat is absorbed and the energy increases (absorbed from surroundings)

38
Q

Exothermic Reaction

A

Heat is released and energy is lost (released to the surroundings)

39
Q

Conservation of Mass law

A

In a closed system ( nothing goes in the system, nothing leaves the system), the mass of reactants in a chemical reaction must equal the mass of the products after the reaction

40
Q

Why this happens (Law of conservation of mass)

A

During a chemical reaction atoms are neither created nor destroyed, the atoms of the reactants are just rearranged to from product and there is no change in the mass in a chemical equation

41
Q

Conservation of mass example

A

Methane (CH4) + Oxygen (O2) -> Carbon dioxide (CO2) + Water (H2O)

Yr 9 Science (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions