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Chemistry > Organic chem > Flashcards

Organic chem Flashcards

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1
Q

State the combustion reaction for alkanes (use CH4)xc

A

CH4 + 2O2 –> CO2 + 2H20

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2
Q

Alkane substitution reaction with chlorine

CH4 + Cl2 –> ?

A

CH4 + Cl2 –> CH3Cl +HCl

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3
Q

Do most organic cmpds dissolve in water? why?

A

No, they are largely covalent and not polar

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4
Q

Saturated compound

A

Carbon atom joined by single covalent bonds

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5
Q

Unsaturated cmpds

A

Carbon atom joined by double or triple covalent bonds

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6
Q

Are Alkanes saturated

A

yes

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7
Q

Formula for alkanes

A

CnH(2n+2)

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8
Q

Formula for alkenes

A

CnH2n

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9
Q

C2H4 + H20 –>

A

C2H5OH

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10
Q

bromine test of unsaturation: When added to a unsaturated organic cmpd: ________-

A

the brown colour of bromine will turn colourless

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11
Q

Are alkenes saturated

A

No

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12
Q

How polymerisation happen for alkenes

A

C = C double bond in each monomer breaks, allowing monomers to join

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13
Q

how is ethene formed from ethanol

A

Heat ethanol with H2SO4 (dehydrating agent)

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14
Q

How ethanol form carboxylic acid, state eqn

A

oxidation

C2H5OH + 2[O] –> CH3COOH + H20

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15
Q

Carboxylic acid general formula

A

CnH(2n+1)COOH

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16
Q

Ester formation formula

A

Ethonoic acid + ethanol –> ester + water

17
Q

Methanoic acid + butanol –> ________

A

Buthyl Methanoate + water

18
Q

How make ethanoic acid (2)

A

Fermentation

Oxidation from ethanol

19
Q

Petroleum gases use

A

Bottled gas for gas cooker

20
Q

Petrol/Gasoline

A

Fuel for motor cehicles

21
Q

Naphtha uses

A

feedstock for petrochemicals

22
Q

Kerosene/ paraffin

A

fuel for jet aircraft; fuel for oil stoves

23
Q

diesel oil

A

fuel for diesel engines

24
Q

lubricating oil

A

lubricant in engines; for making waxes and polishes

25
Q

bitumen

A

to surface roads

26
Q

What is cracking

A

Breaking larger hydrocarbon molecules into smaller molecules

27
Q

Product of cracking

A

smaller molecules of alkanes, alkenes and hydrogen

28
Q

Thermal cracking

A

alkanes heated to high temp under high pressure

29
Q

Catalytic cracking

A

alkane molecules passed over a catalyst at high temp.

30
Q

Alcohol formula

A

CH(2n+1)OH

31
Q

Complete combustion general formula

A

CxHy + (x+y/4) O2 –> xCO2 + y/2 H2O

32
Q

what happens when there isnt enough oxygen for combustion

A

incomplete combustion happens, which result in production of carbon monoxide or soot

33
Q

What is a isomer

A

molecules that hv same molecular formula, but diff arrangement of atoms in space

Chemistry (9 decks)

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