Hydrogen (Part - 2) - Alkali & Hydrogen, Chemistry, Class 11 Video Lecture

hello friends this video and hydrogen
part 2 is brought to you by exam feel
calm no more fear from example let's
talk about the first thing that is
reserve lens with alkali metal the first
the electronic complication you see the
article I met you Alai darker image
layer into sodium potassium train
so if you see hydrogen the electronic
conviction is what 1 s 1 but lithium
what is the electronic and revision it
is helium 2 s 1 for sodium what is the
electronic configuration it is of neon
3s once we have difficulty in
understanding the Ronnie conviction
watch the video and atoms where we have
discussed the electronic configurations
so we see the pattern is same right
pattern is same electronic community
they have one extra element to achieve
the stability the new electron them
tester it so the electronic
configuration is almost same correct the
electro positive character what is
electro positive see the moment you
think of electro boys you should think
of something called h-class na+ k+
anything that gets plus sign right this
is nothing but electro positive that
means they lose the electron and get the
plus sign correct positive that means
the element will lose electrons will get
plus sign correct now you see for sodium
for example you can put in water
naked-eye equals so it becomes na plus
and 0 on the side right this becomes any
class
similarly for water also if you do
hydrolyzes so the electrolyte is if you
do
Electra license what you get is H plus
you get hydrogen we are not seeing
either hydrogen oxygen yes but this guy
hydrogen gas is collected at cathode we
will discuss this since it is collected
cathode that means it has electro
positive like you use same thing for any
seat also you will see that in is n na
will be cutted cattle correct so this
means it has left over so what you see
h+ is a common thing you'll see HC laws
right i said it breaks into h plus f0
minus so this guy is electro positive
the next is the oxidation state so for
oxidation state if you see you talk
about sodium the oxidation state is plus
1 if you talk it pro - iam the oxidation
that is personal so for most of the case
we have scenarios where the oxidation
state is not much fun but most of the
case it is plus 1 and if you don't know
oxidation change was the previous
chapter we explained oxidation state so
we have this oxidation state of plus 1
for hydrogen also we have oxidation
state of plus 1 in most of the case
right so oxidation state is plus 1 for
would alkali in hydrogen correct booth
are reducing agent why because see
reducing agent is what reducing it is
someone who can reduce or will get
oxidized right thing from this one you
see here in something who can get
reduced who can reduce others or get
oxidized get oxidized means lose
electron right so something X becomes X
plus is oxidized that means you are
losing electron you know that alkali
metal has tendency to do slipped on
because na is non that stable but na
plus is stable and that's why you get na
plus and sylvans and so easily
right because you discuss this in the
atom chapter that na has one extra
electron
- wait one if that one electron the
outermost electron is lost it it attains
the balance sorry the noble gas
configuration so this is more stable
this is less stable right so this guy
easily gets oxidized so it is a good
reducing nation so similarly hydrogen
also becomes H+ and we'll take an
example for this example if you have
copper oxide add hydrogen
this becomes copper and h2o right you
have V 2 O 3 you add some potassium this
becomes Q 2 plus so here if you see
copper is what copper is reused right cu
Cu o becomes see you right so this must
have oxidation state of 2 this is
oxidation not zero if you have issues in
oxidation state please watch the
previous video see this has from 2 to 0
it is reduced similarly here also you
see this becomes minus 6 this will
become plus 3 and this is a so here
although this guy also got it used right
because this becomes minus 2 minus 23 6
minus 6 and this total has to be 0 this
becomes plus it's also got reduced so
both have reducing capsule slate if you
talk about hydrogen on a production both
hands you see here see the last a
similar property is formation with the
electronegative element so what is the
electronegative element so we have
electronegative elements can be my
chlorine CL minus is electing infinity
element oxygen 2 minus is a
electronegative atom they are sulfur is
also a lot of little in the element so
let's let's take the example
so sob with chlorine hydrogen makes SCN
its let's take some alkali metal along
with sodium it makes NaCl
so you see both has this kind of thing
with the oxygen hydrogen makes h2o in
sodium if you add sodium - what - listen
form and a university usually similarly
let's talk about sulfur if you add
sulfur to hydrogen you get h2s if you
add sodium to hydrogen you negate
anyways so we see similar structure
right so when we talk about
electronegative element combination yes
both sodium or potassium on hydrogen
they combine in the similar pattern
correct so that's so you can see that
these the hydrogen has none of resonance
with alkali bit now electric part is it
it not only has resemblance with alkali
material it has difference also with
alkali metal right so let's talk about
autism get over here the first
difference is the ionization enthalpy so
if you see the ionization enthalpy of
hydrogen it is very high it is very high
and this is one three one two and we
talk about ionization enthalpy of alkali
metal it is low example if you see for
sodium it is four ninety five kilo Joule
per mole for lithium it is five twenty
kilo Joule per mole in potassium all
that is low for 1-800 here
you see for Irish in that way hydrogen
is very high and for alkali right
witness pretty low also sighs and
existence of H+ if you see the size of
H+ is very very slow it is a very
critical property we'll talk about the
storage of hydrogen in that case we'll
we'll talk about this the size of JP
changing color size of H+ is very small
then why we'll talk about a different
rate of higher hydrides where hydrogen
can be stored and that they are looking
for the potential place to store
hydrogen's right so this is very very
very small but and also it doesn't exist
me it doesn't exist you suppose it is
very small and it doesn't exist it
actually when we say s3 your class that
is wrong it does not exist even in SJ +
rh + V just for simplification we write
h3o plus or h + hydronium ion h+ but
actually it exists as h9 + in such a
complex form right this is how we exist
correct Sdn is 3 o + null is a
simplified version of this just to make
our life simple but if you see alkali
metals size is big one thing is there
right the second thing is there na plus
exists if you could just hold em provide
the comments or in water you'll see lot
of na plus ions I didn't exist really so
that is one difference the third
difference is the difference in the
halide property so if you t is halides
means halogens mix again you can take
chlorine so if you see HCl and if you
see any sale we we told it both exist
right but the property is different if
you talk about SC l it is a covariant
one y : one
because you talk about chlorine chlorine
has seven and hydrogen has hominy one
they won't work they don't nobody want
to give right so there is a shape then
just share there is a share like this
and this got head for retention and they
will form a covering my talk about n is
here it has one extra electron and cl
has again seven so na will give electron
that become the transfer of electron so
it will become na plus CL minus right so
this is the electro so it is ionic bond
because the bond is because of ion
formation right there two different ions
and as seen is gas NaCl is solid so if
you see if you talk about the halide
properties they have different physical
properties one is gas in one is only
solid and in case of hydrogen its
covalent bond because nobody want to be
I didn't also want one electron to
achieve stability fluorine or a cop
sorry
chlorine also wants to take my electron
to attain stability so both will share
electron and then have a covalent bond
you know so sodium chloride there will
be complete transport electron and you
get na+ and cl- sure it will be a ionic
bond so if you don't understand cove end
and i want please watch my previous
videos when we explain what is ionic and
what is square in one and how to gain
distance now we have studied the
difference and the similar deal with
alkali metals thank you
visit exam viacom to watch free
education videos try free online deaths
in the best quality study materials
study from the best tutors and mentors
and much more thanks and sorry