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Chemistry p2
topic 10
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Cards (34)
For
cations
do
flame
test
,
precipitation
reaction or
ammonia
test
Add
more
sodium
hydroxide
to
calcium
and
aluminium
silver
iodide is
yellow
silver
bromide
is
cream
colour
silver
chloride
is
white
iron2
is
green
precipitate with hydroxide
with
Hydroxide
iron3
has a precipitate colour of
brown
nitrates
and
ammoniums
always
dissolve
hyroxide
,
oxide
and
carbonate
rarely
dissolve
copper
has a
precipitate
colour of
blue
damp
red
litmus
paper and
ammonia
present if
blue
Lithium
burns
red
potassium
burns
lilac
copper
burns
blue-green
sodium
burns a
yellow
colour
calcium
burns
orange-red
magnesium
burns
white
Test for
carbonate
is adding
dilute acid
if
carbonate
is present
bubbles
will
form
add
dilute hydrochloric acid
and then
barium chloride solution
to test tube
Positive
result is
white precipitate
if
insoluble
barium
sulphate
produced
halide
test is adding
nitric acid
and then add
silver nitrate
Nanoparticles
can
catalyse reactions
more
efficiently
because of
large surface area
:
volume ratio
nanoparticles
may become
dangerous
nanoparticles
can enter
body cells
or transport
toxic chemicals
to areas of the body where they are
not needed
Thermosoftening
melts when
heated
thermosetting
doesn't melt but
sets
when
heated
Composites
are made from
2 or more materials
Matrix
binds
them
together
Reinforcements
are the
fibres
or
fragments
composites
:
fibre glass
,
plywood
,
concrete
and
carbon fibre
Borosilicate
glass is made from
sand
and
boron trioxide
, is
harder
to
melt
and
break
Soda
lime
glass made from
sand
,
sodium
carbonate and
calcium carbonate
Glasses can be used as
insulators
because they have no
gaps
between particles so
heat
cannot
pass through easily