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advanced videos Hello friends in the
last section we have studied in Numerical
which was based on that is Farady's first law and
now what we are going to do is we are
going to solve the third problem which
is based on Farady's first law so let us
see and let us determine what will be
the answer for it
since present on the screen and then say
qusetion which is related to a current of
6 ampere is fast through alcl3 solution
that is aluminum chloride solution for
50  using platinum electrode when
0.50 gram of aluminum is produced what
is the molar mass of aluminum so easily
we have did the estimation of weight
then we have did estimation of the time
and now we are going to estimate what
would be the molar mass of aluminum so
let us do this equation and this cushion
but first of all the thing that we
should do is we should extract the data
present in the given cushion so the
first thing that we are getting is six
ampere of current which means I is goes
to 6 ampere then the time that is 15
bits is before it to us and that time
should be converted into seconds and now
the weight that is it is also being
given that is zero point five zero four
here and because of which we have to
calculate the molar mass of aluminum so
let us see how can we calculate this we
know that the date data that has been
provided to assess current ice goes to 6
ampere
well that of time is given as 15 minutes
we should be converted into seconds so
450 into 60 will give us a number of 900
seconds and the last that is W that is
made or mass of the produced substance
that has been deposited during this
process was 0.5 0 4 gram of any medium
so every data is with us but the one
data which is not with us is yes the
equivalent freedom so we can calculate
it but the format W is equals to Z into
I into T divided by
nine six five zero zero so the first
thing that we have to estimate or we
have to determine is the value of Z so
that's what we could write it in this
way therefore Z is equal to W into nine
six five zero zero divided by I into T
and now in this case the value of W is
given to assist zero point five zero
four into nine six five zero zero
divided by the value of current is given
a six and pair and the value of n is
given as nine hundred seconds so by the
help of this we could estimate the value
of Z s
so the equivalent rate of the aluminium
in this solution was found to be nice
but with the help of this we could also
estimate what would be the molecular
weight of these symbols so let me give
you an information that the solution
that they have provided to us is alcl3
solution
so when alcl3 is been dissociated it
gives us n 3 plus plus 3 times of CN
minus so in this case what you can
observe is you can observe there is 3
plus charge on the observation state or
it could say the valency of this metal
or this element is basically 3 plus so
we know the Fortner of equivalent wind s
is that which is nothing but the
equilibrant is equals to modular weight
divided by Mellon C so in this case the
molecular weight is to be estimated but
we know what will be the valency of
alcl3 or the fancy of the aluminum
present in lc3 and recently we have
calculated all we have estimated the
value of the equivalent weight of the
aluminum which shows want to be 9 and
therefore the valency which is found to
be 3 will give us the molecular weight
as 92 3 which is 27 moles gram per mole
so this is the molecular weight of any
medium that has been dead man - know so
simple so thank you friends for watching
this video I hope you have got an idea
that how to calculate the molar mass of
a particular solution by using the
equivalent weight and by using the form
of fair this first one so share this
video with your friends and yes don't
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II get a channel thank you so much
