Metal & Acid reaction, Aqua Regia - Metal & Non Metals, CBSE Class 10 Chemistry Video Lecture

hello friends this video on metal and
nonmetal part eight is brought to you by
exam Viacom no more fear from exam
before watching this video please make
sure that you have watched part 1 part 7
so metal + dilute a set will give you a
salt and hydrogen gas if you have a
metal you react this guy with a guy you
de said it will give you salt and
hydrogen gas this we have learned in
last chapter so if you see the rate of
formation of bubble in case of magnesium
was fastest and the reactions the most
eggs were forming in this case we do it
I realize shear the reactively decrease
in this order so we may confuse about
magnesium aluminium zinc and iron when
we reacted with acid
we found the Activity series in case of
copper nobles were seen that temperature
was unchanged this show that copper does
not react as these are something my
observation actually can say that these
are my observation we actually did that
in the lab or if you actually do in the
lab you'll see that the the rate of
bubble formation the - is more el Maryam
is little less zinc is it less iris or
the mug less correct so with this you
observe that this is the pattern of my
reactivity series alright so by now the
reactivity series we know is we have
this potassium sodium we don't know
which one is more reactive then we have
this calcium and magnesium in omission
is more reactive in this case and then
we have this aluminum zinc and iron we
have this series also correct and then
we have this lead and copper we don't
emission is more reactive and then we
have gold and silver we don't know which
one is ammonia so till now we have got
the series right almost we are done so
we need to find the which one is more
reactive in
all these buckets there's bucket the
bucket in this part right this week
nobody reacted with acid he found us
correct let's see what acid reacts with
gold
generally you'll see that most viruses
we don't react at gold but there is
something called aqua regia this
dissolves coal
so let's little earn this aqua ratio
also we are critical from exam point of
view aqua regia is nothing but a freshly
freshly it has to be fresh freshly
prepared cons a mixture of concentrated
HCl and concentrated nitric acid in 3 is
to 1 so that means I'd take hno3 and HCL
in 3 is to 1 3 is to 1 ratio
both are concentrated both are
concentrated and freshly prepared that
is called a quality solution and this
dissolves coal so but if you see you put
hydrochloric acid in the gold it will
dissolve but this this mixture dissolve
right and this is highly corrosive it is
wrong a few agents which dissolves gold
and platinum very few elements which a
solution which dissolves wood right so
this is one you should know
so let's react this metal the nitric
acid we have done with the HCL as hit
last time so in this case when you
dissolve with nitric acid hydrogen gas
is not in word you see hardness is not
involved in the metal reacts with nitric
acid this is because nitric as it is
such a strong oxidizing agent the
oxidized the hydrogen produced water
so whatever hydrogen is produced it
converts into water itself right and
itself it reduce to nitrogen oxides but
magnesium and manganese but nitric acid
to involve hydrogen gas this is the
exception so you remember this that's my
knees and magnesium react my trick acid
also to mom heart is good but other
matters when you react with nitric acid
it won't form hardening else because
nitric acid
is is such a strong oxidizing agent it's
strong oxidizing agent it oxidized
hydrogen form to water correct see it
oxidized this to h2 plus correct so such
oxidizing agent nitrogen this is a nice
tubular that is nothing but water okay
but in case of magnesium in man is it
thank you
visit exam viacom to watch free
education videos try free online tests
get the best quality study materials
study from the best tutors and mentors
and much more
thanks and screen