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AS Chemistry > GCSE Reactions > Flashcards

GCSE Reactions Flashcards

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0
Q

Metal oxide+acid->

A

Salt+water

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1
Q

Metal+acid->

A

Soluble salt+hydrogen

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2
Q

Metal carbonate+acid->

A

Salt+water+carbon dioxide

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3
Q

Ions+ions->

A

Insoluble salt

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4
Q

Acid+insoluble base->

A

Soluble salt

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5
Q

Acid+alkali->

A

Soluble salt+water

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6
Q

Is combustion exo or endothermic?

A

Exothermic

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7
Q

Is neutralisation exo or endothermic?

A

Exothermic

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8
Q

Is oxidation exo or endothermic?

A

Exothermic

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9
Q

Is thermal decomposition exo or endothermic?

A

Endothermic

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10
Q

Hard water+soap->

A

Scum

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11
Q

Temporary hard water has ? In it that decompose on heating to make ? Which react with Ça and Mg

A

HCO3- ions…..=carbonate ions (Mg/Ça carbonate=precipitates)

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12
Q

Heating hard water=

A

Scale

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13
Q

Sodium carbonate+ Mg or Ca->

A

CaCO3 or MgCO3

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14
Q 
Flame tests:
Green-
Potassium-
Lithium-
Calcium-
Sodium-
A 
Green- barium
Lilac-potassium
Crimson-lithium
Red-calcium
Yellow-sodium
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15
Q 
Ion tests:
In sodium hydroxide...
- white precipitate
-white precipitate+dissolves in excess NaoH
-blue precipitate 
-green precipitate
-brown precipitate
A
  • white precipitate=Al, Ca, Mg
  • white precipitate+dissolves in excess NaoH=Aluminium hydroxide
  • blue precipitate =copper
  • green precipitate =ironII
  • brown precipitate =iron III
16
Q 
Ion test
In silver nitrate solution+dilute nitric acid...
-white precipitate
-cream precipitate
-yellow precipitate
A
  • white precipitate-silver CHLORIDE
  • cream precipitate- silver BROMIDE
  • yellow precipitate- silver IODIDE
17
Q

Ion test
In barium chloride solution+dilute HCl…
-White precipitate=

A

-white precipitate=sulfate ions

18
Q

Nitrogen+hydrogen

Give reaction conditions

A 
Ammonia
450'C
Iron catalyst
200 atmospheres
Cooled, ammonia liquefies, removed, H+N are recycled
19
Q

Alcohol+water=

A

A neutral solution

20
Q

Alcohol+sodium=

A

Hydrogen

21
Q

Ethanol+chemical oxidising agents/microbial action->

A

Ethanoic acid

22
Q

Carboxylic acid+water=

A

Acidic solution

23
Q

Carboxylic acid+carbonate=

A

Carbon dioxide

24
Q

Carboxylic acid+alcohol (+acid catalyst)=

A

Esters

25
Q

Ethanol+ethanoic acid=

A

Ethyl ethanoate

26
Q

Ammonia+water=

A

Alkaline solution

27
Q

Hydrocarbons, metal extraction

A

Hydrocarbons

28
Q

Combustion of hydrocarbons

A

Carbon and hydrogen are oxidised…it releases energy

29
Q

Cracking hydrocarbons

A

Heat, vaporise, pass over hot catalyst/ Mix with steam, heat to high temperature for thermal decomposition

30
Q

Alkenes effect on bromine water

A

Orange to colourless

31
Q

Polymerisation

A

Many monomers join together from alkenes to alkanes

32
Q

How to make ethanol

A

Hydration of ethene with steam and catalyst
Or
Yeast turns sugar into CO2 and ethanol

33
Q

How to harden vegetable oils

A

Unsaturated hydrocarbons reacted with hydrogen with a nickel catalyst at 60’C (hydrogen added to carbon=carbon bonds)

AS Chemistry (9 decks)

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