L37 : Hydrolysis of salt - Equilibrium, Class 11 Video Lecture

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to calculate the degree of ionization of
point zero five and messaging SMS that
key value is given and all the degree of
ionization dissipation direction mean
the solution also contains falling zero
1 f CL see Kappa rating the degree of
this question is very simple CPK is
given that is four point seven for the
dad you can find K there is -10 + log of
this we played one point 8 to 10 to the
power minus 5 right and this is you know
right degree of this is nothing but
alpha K by C J's we have got 1 point 8
to 10 to the minus 5 and C's we have C
point zero 5
you saw all this you get alpha L 1 point
9 10 to the power minus 2 this is easy
right degree of ionization now the
question is how is the degree of
dissociation impacted when we have HCL
so I have X eel if you see did you
completely decision to X plus and Cl
miles file correctly so the reaction I
had was a citric acid reaction ch3cooh
give ch3coo minus plus X plus so let's
assume this already had t is equal to 0
and point 0 1 MHC L right this was 0 and
ch3cooh
also we had point 0 5 m isn't it let's
assume at T is equal to equilibrium so
this assume that this moves in the
forward direction this zoom right so in
that case this becomes X this becomes X
and this becomes X plus 4 n 0 1
correct so if you see the concentration
of cs3 CoH and no very less actually
remove very less and since we need to
find a degree of disposition so let's
not take X here let us take into 1 minus
alpha
it means alpha is are you serious and
this becomes C alpha that is point zero
five into alpha and this becomes 1 0 1 +
0 5 are correct 0 of X I am taking C
alpha now CBC since the reaction will
proceed very less in the forward
direction I can assume that
concentration of ch3cooh is almost equal
to point zero 5 alpha is almost zero and
ch3co - I can't ignore here so it has to
be prime 0 5 alpha + s + I can take it
almost equal to point zero 1 because
this is very small value right so if a
rule for hat the form a donkey this will
become in saturation of X plus C is 3 0
minus y concentration of ch3cooh right
so that is nothing but X plus is what
this guy point 0 1 into ch3co - is 1
point 0 5 alpha Y ch3cooh is point 0 why
it's canceled and this is referred to
what given we have partners this time
okay 1 point 8 to 10 to the power minus
1 you saw there is you get alpha is
nothing but 1.8 1.8 24 - very small okay
so what we have done when we started
that time only we had some 5 to 9
halation for next year that is all you
think there is a similar question but we
have one last one
so the ionization constant is given we
define the degree of ionization so
degree of is nothing but blue box maybe
by see nothing but 5.4 10 to power just
by C is point zero two you saw this you
get zero point one six this is my degree
of attention the next question or the
percentage of the methylated is ionized
the solution already has point one MOH
so this is also very easy actually if
you see I'll just do ready what C is 3 C
2 NH plus h2o
if CS 3 2 - 2 HT plus lots of poisonous
right so IP is equal to 0 it says that
it has point 1 in the point whenever
this there this is not there this is
ignored and this is we have point zero
to him right so at T is equal to
equilibrium so this will have let's
suppose point 0 2 minus X this will
become X and this will become point 1
plus X correct so my KB is what same
thing this is a 5 point 4 10 to power
minus 4 this is equal to what
concentration of this this X
concentration of this H minus there is
point 1 plus X almost equal to point 1
and this point 0 2 minus X almost equal
to point zero 2 so you saw this you get
X is it going to you get something but I
want alpha alpha is what see X I want
alpha actually so if you see see my
little exercise
so alpha is equal to CL 5 into X so
alpha is equal to X by C right let me
try to find X by C this quantity so this
becomes alpha so I get from this alpha
is if you want to find five point
for HIPAA minus four divided by 0.1 that
is five point four integrated ominous
this is my new one all right so this is
easy actually if you want to avoid
percentage dissociation this is what
nothing but alpha into 100 so five point
four ten to power minus three in 201
only one point five percent a very
simple question so the question says the
pH of black coffee tomato juice lemon
juice XR these is this we have to find
the corresponding hydrogen ion
concentration equation is pretty simple
CH dress is nothing but getting the
required - wah-wah it's plus so H this
will be 1 this is something that you
take negative both side - please nothing
but long on this so Express is nothing
but log antilog any log of minus H so
you find the ideal of of - 6.8 you will
get value is 1 point 5 minute 520 powers
so we have a black coffee by this H
beside me
indeed above minus 5 that is nothing but
10 to power minus 5
now doctor might not use as specific or
ended above minus 4 point going but 6.31
chin to the sky similarly
lemon juice taste the support and you
log of minus 2
there is nothing but a love of -
Superboy please 6.31 continously then I
have egg egg 2 P 1 NT logoff - I'm going
to it
that is nothing what five point one
point five eight five there's fewer
maths they need to find - any love - bah
okay so h plus nine is only well until
of ah - eh that was man sir so the
question says 0.56 one gram of - in
writer sentence is all wanted to be
human and Evan of solution is tonight
you can you define to put our
consideration of production of nitrogen
at a salon so everything we deal in
moles per liter right so let's find the
molarity of Koh that becomes 0.564 grams
right and what is the more robust 56 per
liter so I have 100 ml by 1000 this is
my third liter so if you saw this this
comes on to be put into the vial
so I have point zero five M of Koh gives
ki + + h ma since I'm drawing single
side because that means is very strong
base will dissociate completely this is
point zero 5 m at T is equal to 0 is
equal to after some time this becomes 0
this becomes 1 T Phi so my OS finest an
ion doesn't this is nothing but point
zero 5 correct similarly my H+ ion
concentration will award 10 to the power
minus 14 by H minus concentration 10 to
power minus 14 by point zero 5 not
nothing what going into the power minus
30
you want to find the pH nothing but
minus log of h plus angle relation what
is nothing but minus log of 20 to the
power minus 13 you solve this you get
PHS 2 2 + 4 NZ that's answer thank you
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