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Nat 5 Chemistry > Unit 2 > Flashcards

Unit 2 Flashcards

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1
Q

Definition of homologous series

A

A family of compound with the same general formula and similar chemical properties

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2
Q

General Formula for alkanes

A

CnH2n+2

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3
Q

General formula for cycloalkanes

A

CnH2n

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4
Q

General formula for alkenes

A

CnH2n

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5
Q

Definition of isomer

A

a compound with the same molecular formula but different structural formula

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6
Q

Bromine goes from orange to colourless when a ______ is present

A

alkene

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7
Q

what is the common name for ethanoic acid

A

vinegar

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8
Q

functional group of carboxyl acids

A

carboxyl

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9
Q

functional group of alcohol

A

hydroxyl

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10
Q

three uses for alcohols

A

recreation (drinking)
fuel
disinfectant

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11
Q

alcohol’s pH

A

7 - neutral substances

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12
Q

general formula for alcohols

A

CnH2n+1

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13
Q

what must oxygen always be attached to in a homologous series

A

the carbon

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14
Q

how must under 14% of alcohol be made

A

fermentation

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15
Q

how must above 14% alcohols be made

A

distillation

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16
Q

Alcohols are soluble in water. True or False?

A

True

17
Q

The shorter the carbon chain, the more or less soluble alcohol is in water?

A

shorter carbon chain = more soluble

18
Q

what are the units for Eh

A

kilojoules (Kj)

19
Q

what are the units for specific heat capacity (c)

A

Kj-1 c-1

20
Q

what are the units for mass (m)

A

kg

21
Q

what are the units for change in temperature (🔺T )

A

degrees celsius (°c)

22
Q

do carboxylic acids have a pH above or below 7

A

below

23
Q

what does combustion mean

A

burning in oxygen

24
Q

alkanes - single or double bonds?

A

single

25
Q

alkenes - single or double bonds?

A

double

26
Q

cycloalkanes - single or double bonds?

A

single

27
Q

alkanes - saturated or unsaturated?

A

saturated

28
Q

alkenes - saturated or unsaturated?

A

unsaturated

29
Q

cycloalkanes - saturated or unsaturated?

A

saturated

30
Q

what are alkanes used for

A

gas and fuels

Nat 5 Chemistry (3 decks)

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