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science 2 > metals and acids > Flashcards

metals and acids Flashcards

1
Q

metals propeties:

A

sonorous
ductile
malleable
shiny when fresh
strong
high mp/bp
good conductors of heat and electricity

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2
Q

non metal properties:

A

non-sonorous
dull colours and appearance
poor conductors of heat and electricity
non-malleable
non-ductile

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3
Q

how do we know when a metal reacts with an acid:

A

effervescence
sparks
colour change
endothermic /exothermic reaction
temp change
any new substance formed
smell

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4
Q

effervescene-

A

bubbles appearing

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5
Q

exothermic and endothermic energy:

A

gives out energy
gives in energy

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6
Q

sulphuric acid
hydrochloric acid
nictric acid

A

violently corrosive
dissolves iron, smells and colourless
colourless and poisonous

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7
Q

lithium plus nitric acid

A

lithium nitrate

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8
Q

magnesium plus hydrochloric acid

A

magnesium chloride

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9
Q

zinc plus sulphuric acid

A

zinc sulphate

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10
Q

metal plus acid

A

metal plus acid=salt plus hydrogen

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10
Q

salt you get at the end depends on and other name for salt:

A

depends on the metal and acid reacting
another name: sodium chloride

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10
Q

hydrogen practical:

A

pour 10ml of metal in test tube
add metal in it
cover top with your finger
when you see formation of bubble put a splint of fire and a pop should occur
shows hydrogen is explosive and flammable
bubble produced are hydrogen gas as have properties of H+ ions

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10
Q

oxidising:

A

combining chemically with oxygen

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10
Q

how to determine the reactivity of metals:

A

test all metals in a tube of water and see which one changes colour more or weighs more

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10
Q

rusting:

A

oxidising reaction in prescence of air moisture

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10
Q

corrosion:

A

when certain materials deteriorate as a result of rusting

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10
Q

only non-metal that conducts electricty:

A

carbon

11
Q

which metals dont reat with water:

A

platinum
gold
silver

12
Q

iron plus oxygen plus water

A

iron hydroxide + hyrdogen

13
Q

catalyst:

A

substance taht changes speed of something without it being permanently changed itself

14
Q

examples of a catalyst:

A

hair straightener/curler
catalyst converter-in your car

15
Q

which metal reacts with oxygen but not water

A

copper

16
Q

why doesnt allumnium rust/

A

when opened reacts with oxygen so has a oxide layer preventing any incoming present air moisture.

17
Q

what is the only metal taht ca rust:

A

iron

18
Q

what is the only metal taht rusts and the equation:

A

iron plus oxygen plus water=iron hydroxide

19
Q

oxygen equation: metal + oxygen

A

metal oxide

20
Q

reactivity series:

A

patty
said
little
big
cats
might
attack
zebras-zinc
cats
um/on/her

21
Q

2 non metals ?

A

carbon
hyrdogen

22
Q

3 metals reactive wit wtaer?

A

potassium
calcium
sodium

23
Q

4 unreactive metals?

A

silver
gold
copper
platinum

24
Q

displacement reaction:

A

when a more reactive metal displaces a less reactive metal from its compounds.
calcium oxide + barium= barium oxide + calcium
barium more reactive thats why takes place by the compound-oxygen

25
Q

metal + water=
metal + oxygen=

A

metal oxide
metal hyrdoxide+ hyrdrogen

26
Q

ores:

A

Ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them.

27
Q

extracting metals depends on

A

reactivity of metals
how stable the ore is

28
Q

extraction of very reactive metals:

A

melted and electrolysed w current supply of electricity
potassium ions+ electrons=potassium metal

29
Q

extraction of reactive metals:

A

heated with carbon or carbon monoxide:
copper ions+ carbon= copper metal + carbon dioxide

30
Q

extraction of unreactive metals:

A

only needs to be heated:
silver ions= silver metal + oxygen

31
Q

how do you find out the mass in a ore:

A

calculate the whole mass and divide it by mass of the metal and times it by 100 to get it to a percentage

32
Q

ceramics properties and facts:

A

ceramics ‘‘out of pottery’’
made out of clay
high mp, brittle , soft before hand, hard, strong, heat resistant, good insulators, good strength
some metal compounds-silicates and oxides
stages of a mug
mined from ground-extraction
water added-wet
moulded to shape
put in a hot oven-kiln
baked and then design and shabash

33
Q

composite facts:

A

made up of different materials to improve their properties
combo of natural or synthetic- not natural chemically processed
fibre, sheet or particle based composites
examples; laminated glass, concrete-sand, crushed rocks and cement. and your raincoat.
don’t rust, very light can withstand stretching and forces squashing

34
Q

polymers:

A

long chain of molecules made up of monomers
monomers-small repeated units
natural or synthetic- DNA, cellulose and polyethylene
example-daisy chain
daisy-monomer whole chain-a polymer
flexible, strong and durable

science 2 (11 decks)

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