metals and acids

Question 1

metals propeties:

Answer 1

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

Question 2

non metal properties:

Answer 2

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

Question 3

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

Answer 3

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

Question 4

effervescene-

Answer 4

bubbles appearing

Question 5

exothermic and endothermic energy:

Answer 5

gives out energy
gives in energy

Question 6

sulphuric acid
hydrochloric acid
nictric acid

Answer 6

violently corrosive
dissolves iron, smells and colourless
colourless and poisonous

Question 7

lithium plus nitric acid

Answer 7

lithium nitrate

Question 8

magnesium plus hydrochloric acid

Answer 8

magnesium chloride

Question 9

zinc plus sulphuric acid

Answer 9

zinc sulphate

Question 10

metal plus acid

Answer 10

metal plus acid=salt plus hydrogen

Question 10

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

Answer 10

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

Question 10

hydrogen practical:

Answer 10

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

Question 10

oxidising:

Answer 10

combining chemically with oxygen

Question 10

how to determine the reactivity of metals:

Answer 10

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

Question 10

rusting:

Answer 10

oxidising reaction in prescence of air moisture

Question 10

corrosion:

Answer 10

when certain materials deteriorate as a result of rusting

Question 10

only non-metal that conducts electricty:

Answer 10

carbon

Question 11

which metals dont reat with water:

Answer 11

platinum
gold
silver

Question 12

iron plus oxygen plus water

Answer 12

iron hydroxide + hyrdogen

Question 13

catalyst:

Answer 13

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

Question 14

examples of a catalyst:

Answer 14

hair straightener/curler
catalyst converter-in your car

Question 15

which metal reacts with oxygen but not water

Answer 15

copper

Question 16

why doesnt allumnium rust/

Answer 16

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

Question 17

what is the only metal taht ca rust:

Answer 17

iron

Question 18

what is the only metal taht rusts and the equation:

Answer 18

iron plus oxygen plus water=iron hydroxide

Question 19

oxygen equation: metal + oxygen

Answer 19

metal oxide

Question 20

reactivity series:

Answer 20

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

Question 21

2 non metals ?

Answer 21

carbon
hyrdogen

Question 22

3 metals reactive wit wtaer?

Answer 22

potassium
calcium
sodium

Question 23

4 unreactive metals?

Answer 23

silver
gold
copper
platinum

Question 24

displacement reaction:

Answer 24

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

Question 25

metal + water=
metal + oxygen=

Answer 25

metal oxide
metal hyrdoxide+ hyrdrogen

Question 26

ores:

Answer 26

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

Question 27

extracting metals depends on

Answer 27

reactivity of metals
how stable the ore is

Question 28

extraction of very reactive metals:

Answer 28

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

Question 29

extraction of reactive metals:

Answer 29

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

Question 30

extraction of unreactive metals:

Answer 30

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

Question 31

how do you find out the mass in a ore:

Answer 31

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

Question 32

ceramics properties and facts:

Answer 32

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

Question 33

composite facts:

Answer 33

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

Question 34

polymers:

Answer 34

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