Chemical Properties of Alkaline Earth Metals Video Lecture - Chemistry Class 11 - NEET

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strong about the train to the carbonates
the coverage of the alkaline earth
metals are generally insoluble body and
they can easily be precipitate by adding
sodium or I mean the carbonate with my
soluble salt for example I have my
sodium carbonate this in solid water if
you add class in provided this gives you
calcium carbonate this guy is inside
correct see my sodium carbonate was
soluble in water my calcium carbonate is
insoluble in water so as well as the
solubility dunes of carbonate is
concerned we know that in fact this rule
for solubility they say that for
carbonate all this all the carbonates
are insoluble except my book 1 and
ammonium to accept this all are
insoluble so if you see this is group 2
calcium so it is insoluble this is
soluble this is first row right
so for solubility they are factors which
determine the solubility spell best is
based on experiments they have come up
with some rules and that is the best
rule to find solubility for a given
right I'll take you to the solubility
once I'm done with this slide and all
the cupboards decompose on heating to
eat carbon dioxide and oxides
so you eat any this one will take any
metal copper carbonate you need this
metal oxide and objects this is what it
says right so any other comments very
heated it becomes metal oxides and
carbon monoxide barely you covered is
very unstable and it gets and why it is
unstable if you see the cop we have
taken an example also carbonate ion is a
big iron let suppose carbon and iron
barium is small the size difference is
very high so it's very unstable if you
go down the group if you go
the size increase and then you you find
that the size between the carpets and
the methods become almost compatible and
thus they become thermally stable and if
you have taken this example somewhere
where you go down the grow the size of
the metal increases the metal and the
carbon its head they become almost
comfortable you could have so it becomes
stable let's talk about the solubility
part now because you're confusing many
times why it is soluble the various
rules first of all the first thing says
that all the my trait ions they are
soluble all are so overrated safe to
talk about chloride sign here also all
are soluble but there are some
exceptions exceptions are we have AG CL
ya g to c r2 we have PVC or - these are
not something you talk about sulfates so
here also all are soluble most of them
are soluble I can see that and there are
some exceptions here also like barium
self-tan PVA for these are not soluble
in water talking about solubility in
water - right if you talk about carbon
rates which we had this in this case
neutral - so here you see most are
insoluble most are not soluble right but
there are some exceptions which are
soluble are NH 4 plus carbons and Group
1 coverage for example sodium carbonate
potassium carbonate sherry we see sodium
perborate was soluble they'd because a
good one
swallow we talked about hydroxides
possible so here also most are not
soluble
right most are not soluble and the
exceptions are again here the group one
example sodium hydroxide potassium
hydroxide
those days then I have can see mater say
barium hydroxide also they have few
exceptions to eat right
similarly for red also I have most of
them are not soluble but there are
exceptions or the book one book to an NH
four plus
they are so these are my stomach's rules
for finding whether a particular
compound is soluble or not best is by
experiments but if we can remember these
rules you can at least tell just by a
and the name that it is one for example
sodium carbonate carbonate sodium Group
one is soluble then you have calcium
covenant carbonates most ion soluble it
is not any infection that it is so let's
talk about the properties of sulfates
now see the sulfates the alkaline earth
metals are stable they avoid solids and
we have stable they are very very still
and they're going to be played by
reacting the alkaline metal with
sulfuric acid example calcium plus
installation for to get calcium sulfate
that's right you guys
or you can we add the oxides of metals
including se we will get himself a plus
one so you can prepare by the active
metal or metal oxides or metal hydroxide
also if you want the same is to SFO you
see if you have calcium carbonate also
you can react with sulfuric acid
catalyst of the bed so you can get this
by the acting metal metal oxide
hydroxide on and cover it with these
they are soluble in water as I have told
for sulfate the rule is it is insoluble
but it is for sulfate the rule was it is
insoluble motion that means but they're
the exception the exception it is mu 1
mu N and it's for us then factor what is
mu mu so it is mostly soluble in water
and the solitary decrease if you go down
and the reason is you see that the
solubility depends on our factors so
this
hydration enthalpy also so if you see
because you hold down the hydration
enthalpy decrease so hydration enthalpy
as I told decrease because they is an
atomic size right so I appreciate that
we decrease the solubility also exist
because already we also do depends on
the hydrogen let's talk about nitrites
now see the nitrates are made by
dissolving carbonates in nitric acid
similar to what we have a sulfate it can
also be prepared by heating the my
metals as I will calcium you can see
Italy or magnesium with nitrogen we have
two ways either heat the right with
nitrogen or you have the cabinet's you
reacted nitric acid and as I have told
they have the formation they have the
real property to absorb water molecules
so if you see the Magnusson maintain it
can take six water molecules will vary
in height it can not take any water so
if you see the hydration tendency
decreases fe go down the why because the
size increase as I told the lower is the
size and high is the charge the weight
of the power to absorb water molecule
but if you go down the group the size
increases thus the hydration power
decrease then we have the liquid nominee
I won't discuss much this almost hundred
to al-karim
similar to alkali here also it gives a
deep blue black solution because of this
ammonia electrons similar behavior as we
had in the alkali metal glue two metals
have a high tendency to form complex
from form and it says this is why
because of the small size and high
charge
they told small size and high charge
they have a huge tendency to form
complex compound example where an even
migration had higher two units to form
complex um one more example in the
chlorophyll if you see this as a but a
complex compound of compound of magnesia
so the group two elements have higher
tendency to form stable complex as you
can
bukhan why because the charge is more
right charge in war and sizes yes thank
you
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