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N5 Chemistry Learning Intentions RM > unit 2 - homologous series > Flashcards

unit 2 - homologous series Flashcards

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1
Q

give three uses for alkanes AND their general formula

A

(natural gas) cooking + heating, petrol. CnH2n+2

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2
Q

alkanes are _____ in water

A

insoluble

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3
Q

what is a hydrocarbon

A

a substance consisting only of carbon and hydrogen

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4
Q

what is a homologous series

A

group of compounds with the same general formula, similar chemical properties and a trend in physical properties

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5
Q

what is the source of hydrocarbons

A

OIL

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6
Q

give two uses of alkenes

A

fuels + solvents

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7
Q

how to test for saturation

A

unsaturated hydrocarbons decolourise bromine

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8
Q

give three uses for cycloalkanes

A

fuel, natural gas, diesel

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9
Q

what are the two products of a hydrocarbon combusting in a plentiful supply of oxygen

A

CO2 + H2O

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10
Q

what is the general formula for the alcohols

A

Cn H2n+1 OH

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11
Q

give 2 uses for alchools

A

alcoholic drinks, fuels

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12
Q

what happens to alcohols mp/bp as they get larger. why?

A

the melting and boiling point increase as the alcohols increase in size due to strong intermolecular forces

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13
Q

give the general formula for carboxylic acids

A

CnH2n+1COOH

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14
Q

name the process by which alkenes are produced from alkanes

A

cracking

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15
Q

which alcohols are soluble in water

A

methanol, ethanol, and propanol

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16
Q

give three features of alcohols which change with size

A

mp, bp, solubility

17
Q

what happens to alcohols solubility as they get larger

A

solubility decreases

18
Q

why do alcohols make good fuels?

A

they are highly flammable and burn cleanly

19
Q

which carboxylic acids are soluble in water

A

methanoic, ethanoic and propanoic acid are soluble in water

20
Q

as carboxylic acids increase in size, _______?

A

solubility decreases and mp/mp increase

21
Q

why does mp/bp of carboxylic acids increase with size?

A

due to stronger intermolecular forces

22
Q

give two uses of carboxylic acids

A

cleaning + preserving foods (pickling)

N5 Chemistry Learning Intentions RM (9 decks)

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