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Chemistry > End Term 2020 > Flashcards

End Term 2020 Flashcards

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1
Q

Define a salt

A

Formed when hydrogen ions of acids are completely or partially replaced by metals

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2
Q

State four types of salts

A

Acid salts, basic salts, normal salts, double salts

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3
Q

What is hygroscopy

A

Process by which salts absorb moisture but fonnot change their state when exposed to air

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4
Q

What is efflorescence

A

The process by which hydrated salts lose water if crystalization when exposed to air

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5
Q

What are deliquescent salts

A

Salts that absorb water vapour and form solutions

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6
Q

Particals found in an atom

A

Protons, electrons, neutrons

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7
Q

Calcium nitrate formula

A

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8
Q

Ammonium chloride formula

A

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9
Q

Sodium oxide formula

A

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10
Q

What i sthe least reactive?

A

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11
Q

1st ionization energy

A

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12
Q

Difference btwn 1st and 2nd ionization energy

A

Second ionization energy is higher because more energy is required to remove electrons from a positively charged ion than a neutral ion

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13
Q

Difference btwn luminous and non luminous flame

A

Non luminous is hotter

Non luminous flames appear hotter

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14
Q

What is used to relieve heart burn

A

ASK

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15
Q

Why is a luminous foame preferred for lighting

A

Produces more light(brighter) ASK THOUGH

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16
Q

Does giant ionic structure conduct electricity

A

No because the electrons ate in fixed positions

17
Q

Metallic |electrical solid| conductivity

A

Conducts, conducts

18
Q

Ionic |electrical solid| conductivity

A

Does not conduct, conducts

19
Q

Covalent |electrical solid| conductivity|

A

Does not conduct, does not conduct

20
Q

Allotropes of carbon

A

Graphite, diamond

21
Q

Why does graphite conduct electrivity but diamond does not

A

Graphite contains delocalised electrons that facilitate conductivity while all electrons in graphite are used up during bonding

22
Q

Why is diamond very hard

A

Strong chemical bonds form a 3d structure ULIZA BABEZ💀

23
Q

Why is graphite used as a lubricant

A

Weak van der waal forces between graphite layers allow them to slide over each other making graphite slippery

Chemistry (2 decks)

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