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Science Revision > Chem Reactions > Flashcards

Chem Reactions Flashcards

1
Q

What are groups on the periodic table

A

Vertical columns

Number of electrons in valence shell

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2
Q

What are periods on the periodic table

A

Horizontal rows

Number of shells

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3
Q

What are cations

A

Positively charged ions

Groups 1 2 3

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4
Q

What are anions

A

Negatively charged ions

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5
Q

What is an ion

A

A charged atom
Wants a full valence shell
Gains or loses electrons

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6
Q

What are neutral atoms

A

No charge

Same number of protons/electrons

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7
Q

Define ionic equations

A

Cation + anion attraction - opposite charges which is electrostatic attraction

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8
Q

What are ionic compounds

A

made up of cations/anions when an atom gains or loses electrons (undergoes ionic bonding)

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9
Q

How to balance a chemical equation

A

Same number and type of atom on each side

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10
Q

What is an acid + base reaction

A

A salt + water

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11
Q

Acid + metal

A

A salt + hydrogen gas

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12
Q

Acid + carbonate

A

A salt + water + carbon dioxide

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13
Q

Potassium hydroxide + sulphuric acid > ?

A

Potassium sulphate

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14
Q

Magnesium + sulphuric acid > ?

A

Magnesium sulphate + hydrogen

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15
Q

What are the properties of acids

A

Corrosive
Sour tasting
Conduct electricity

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16
Q

What are properties of a base

A

Caustic
Taste bitter
Conduct electricity

17
Q

What are acids

A

Proton donors
Release hydrogen ions
Purpose is to react

18
Q

What are bases

A

Proton acceptor

Release hydroxide ions

19
Q

What are endothermic reactions

A

Absorption of energy
Make things cold

Example: photosynthesis

20
Q

What are Exothermic reactions

A

Energy is released
Makes things hot

Example: fire

21
Q

What is combustion

A

Exothermic reaction
Must have oxygen

Fuel+oxygen

22
Q

What is a hydrocarbon

A

Compound that combusts very well

23
Q

When does incomplete combustion occur

A

When there is not enough oxygen

24
Q

Law of conservation of mass

A

Mass can neither be destroyed nor created

25
Q

What are chemical reactions

A

Rearrangement of atoms

26
Q

What is corrosion

A

Oxidation reaction

Metals react slowly with oxygen to create metal oxides

27
Q

What is rust

A

Orange

Corrosion of Iron and steel

28
Q

What is tarnish

A

Black

Corrosion of silver

29
Q

What is verdigris

A

Green

Corrosion of copper

30
Q

Why are ionic compounds in a crystal lattice

A

Ions attract each other (thru electrostatic attraction) form a regular pattern with oppositely charged ions next to each other

Science Revision (4 decks)

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