Class 12 Exam > Class 12 Videos > Electrolytic Conductivity: Numerical (Part - 21) - Electrochemistry, Chemistry, Class 12
Electrolytic Conductivity: Numerical (Part - 21) - Electrochemistry, Chemistry, Class 12 Video Lecture
FAQs on Electrolytic Conductivity: Numerical (Part - 21) - Electrochemistry, Chemistry, Class 12 Video Lecture
| 1. What is electrolytic conductivity and how is it related to electrochemistry? |  |
Ans. Electrolytic conductivity refers to the ability of a substance to conduct electricity when dissolved in a solvent. It is an important concept in electrochemistry as it allows us to understand and measure the movement of ions in a solution. The conductivity of a solution depends on the concentration and mobility of ions present in the solution.
| 2. How is electrolytic conductivity different from electrical conductivity? | |
Ans. Electrolytic conductivity and electrical conductivity are two different concepts. Electrical conductivity refers to the ability of a material to conduct electricity, whether it is in the form of a solid, liquid, or gas. On the other hand, electrolytic conductivity specifically refers to the ability of an electrolyte solution to conduct electricity due to the movement of ions.
| 3. What factors affect the electrolytic conductivity of a solution? | |
Ans. Several factors can influence the electrolytic conductivity of a solution. These include the concentration of ions in the solution, the nature of the solvent, temperature, and the presence of impurities or other substances that may interact with the ions. Higher ion concentration, a polar solvent, and higher temperature generally result in higher electrolytic conductivity.
| 4. How can electrolytic conductivity be measured in the laboratory? | |
Ans. Electrolytic conductivity can be measured using a conductivity meter or a conductivity cell. These instruments work by applying an electric field across the solution and measuring the resulting current flow. The conductivity of the solution is then calculated based on the measured current and the geometry of the cell.
| 5. What are some applications of electrolytic conductivity in real life? | |
Ans. Electrolytic conductivity has various applications in different fields. In chemistry, it is used to determine the concentration of ions in a solution, monitor the progress of chemical reactions, and study the behavior of electrolytes. In environmental science, it is used to assess water quality and measure the salinity of water bodies. In the pharmaceutical industry, electrolytic conductivity is important for quality control of pharmaceutical solutions.
Text Transcript from Video
hello friends this video on
electrochemistry part 21 is brought you
by exam viacom no more fear from exam
now take some numerical the question
says the resistance but conductivity
cell is my conductivity cell filled with
point 1 mole KCl is hundred ohms if the
resistance of same self in with point 0
to M KCl is five twenty home that is
let's suppose it is 0.1 m KCl and this
is point zero 2 m KCl right so this is
my hundred ohms and this is my 520 homes
this is what given right 0.1 m KCl
hundred ohms point one mk7 and o y02
case in 538
calculate the conductivity and the molar
conductivity of this solution if natok I
find conductivity and molar conductivity
of this solution the conductivity of
this solution the point 1 and solution
is given to be 1 point 2 9 the
conductivity is given is to be 1 point 2
9 Siemens per meter please note the unit
this is Siemens per meter so one thing
to notice since they are the two seen
they are to same conductivity cell one
thing that would be common in both will
be cell constant it will be same for
both this constant cell that is nothing
but ly that will be same for both this
cell so if I can find cell constant for
this cell using these values the same
cell cosmic in using this cell in find
out the values correct so I know that
conductivity is nothing but Rho
I'll buy it sorry resistance is nothing
but Rho L by Kurt is nothing but 1 by
conductivity l by a then that is nothing
but 1 by conductivity G star because G
star is nothing but L by cell caution
correct so I know this relation is this
all same actually right or i can also
say Rho into G Star this is one formula
so in this case my resistance is given
all right awesome
this is given and this is what
conductivity that is this K so k is
given so that means this formula is of
no use to me this formula the floor used
to be right because the resistivity
connectivity is given in these two
formulas and I have to find the cell
cons and D star so let me use this
formula it is R is equal to 1 by K into
G Star so let me put the values
resistivity is 100 ohms is equal to 1 by
K K is given this case or in this K is
that fine
resist conductivity you have to find
conductivity 1 by K and K is given here
1.29 s per meter cut this is going to e
2g star so you solve this you get g star
is nothing but hundred homes into 1
point 2 9 Siemens per meter meter
smaller C means into ohms is 1 because I
know that C means nothing but per homes
so when you solve this you get 1 29 per
meter that is my value of cell constant
129 per meter but they are not asking
for this what they asking they ask now
for
this solution this second tallest second
of conductivity cell I have to find the
value walk this conductivity n lambda so
I can use the same formula R is equal to
1 by K into G Star right or this is cell
2 and this is was for cell 1 assuming is
my cell 1 this is my cell so far said to
see anything for sale to resistance is
given 590 ohms is equal to 1 by K I
don't know do G star something I know
129 per meter so you solve this you get
K as nothing but 129 per meter by 520
homes is all this you get 0.42 for 8 1
by Omega thing but Siemens and per meter
is there so this is my conductivity
pretty easy
the next good thing is I have to find
the molar conductivity of this self so I
know my molar conductivity is nothing
but ki by C that is conductivity by
concentration right so here what is my
conductivity conductivity is 0.24 8
Siemens per meter so since it is Siemens
per meter I have to find the right the
concentration in moles per meter cube
please note I have to write in moles per
meter cube but I know the concentration
in moles per liter correct so I know
that the concentration is point zero two
moles per liter and that is our the word
1000 into point zero two moles per meter
cube why because one liter is nothing
but if you see 0.1
metre cube C 1 it is nothing but 10
centimeters cube or 0.1 meter cube so if
you see point 1 1 2 meter cube C 1 liter
is nothing but 10 centimeter cube and
ten zero everything about two point one
meter and there is nothing but point
zero zero zero 1 meter - it's a little I
can I can replace the one inter with
point zero zero one meter cube so you
place liter the big point this is gonna
be tricky that is nothing but you
multiply because nutrition and
denominator means you multiply the whole
thing with one father correct see if you
are confused I can show you here this is
clear right point are volatize nothing
but point zero zero one meter cube right
I can write this CS let me write here
point two moles instead of per liter
alright point zero zero zero one meter
and that is nothing but if you solve
this is nothing but you have to take
this top this is nothing but 1000 in two
point two moles per meter
correct and that's what we have done
1000 into point zero 2 xx point zero two
so we solve this is nothing but 20 moles
point zero into intervals into 1000 is
nothing but 20 moles per meter cube this
becomes 20 moles for it I hope you
understand he just if you have writing
meter the same well it does nothing but
0.1 meter cube that is point zero zero
one that's all and everything we would
take it here
so it will be 2 0 yeah
point 1 cubes point is 2 0
yeah point 1 cave is only 1 point 2 0 1
here so you solve this you get 1 24 into
10 to the power minus 4 Siemens meter
square it was this mid parameter and
meter to one of the meter Eric castle
and you get this as the answer of Maurer
conducting if you want you can find the
same solution in centimeter also here so
in that case what you will get is 124 C
means centimeter square you can actually
directly convert here C 1 meter is
something but tents in Dubai right it's
not it's inhibitor so you say this one
Madrid replace 1 meter square with 100
centimeter square correct so just
replace that so you see that you to
multiply this with 100 centimeter square
is 100 square that is 10 to the power 4
10 to the power 4 into the power minus 1
you can you can directly do the
calculation this is a simple map
actually the next question is the
electrical resistance of column of 0.05
mole per liter
anyway solution on diameter 1 centimeter
and length of T centimeter is this value
this is the resistance you have to find
a resistivity conductivity and boarder
conductivity so this is my solution and
this column is point zero five mole per
liter this is my 2005 moles per liter
eh diameter is 0.5 point on diameter is
1 centimeter that means area if I want
to find here is what PI R square R
becomes 1 by 2 centimeter square this
becomes my area length is what even 50
centimeter please not everything is
intimate from here and the distance is
given 5 point 5 into 10 to power minus 3
ohms resistors is 5 point 5 in 5 into 10
to the power 3 ohms and we had to find
resistivity that is Rho you have to find
resistivity conductivity this K and
molar connect into this lambda correct
the formula you know we know your
resistance is Rho ly the distance is
given Row is conduct register beta V to
find length is given is given let's put
all the values R is nothing but 5 point
5 5 into 10 to the power 3 ohms is equal
to resistivity into length is 50
centimeter by area there is PI into 0.5
square pi is I can write 3.14 so you
solve this equation you get resistivity
as it is seven point one eighty seven
resistivity is 87 point one three five
ohm centimeter because there is over
here and this is centimeter square it's
canceled so we'll get own setting this
is the resistivity if you want to find
conductivity
please don't disperse reduce TD
conductivities kappa nothing but 1 by
row right so this becomes 1 by Rho and
Rho is we have calculated it is seven
point one three i/o Center and this
comes out to be point zero zero 1 4 8 1
by mu becomes Siemens scientific
community centimeter becomes per
centimeter this man conductivity also I
have for it i found conductivity icon
resistivity now I have to find molar
conductivity there is nothing but ki by
C so what is the value of ki point zero
1 1 for a Siemens per centimeter right
now I have to find C the concentration I
have to find a now moles per centimeter
cube now what I know is moles per liter
correct so let me first find that so
concentration I know is point zero five
moles per liter so one liter is nothing
but 10 centimeter cube correct this is
nothing but point zero five by 1000 mole
per centimeter so let us put the values
a point zero five by 1000 mole per
centimeter so we solve this you get go
to nine point six sevens and this
becomes centimeter per centimeter
centimeter q1 gets canceled it becomes
centimeter square per one and that's
nice
just take care the units and you easily
get amps
thank you visit exam viacom to watch
more videos at em free online test get
three study materials find tutors and
mentors and much more thanks once again
electrochemistry part 21 is brought you
by exam viacom no more fear from exam
now take some numerical the question
says the resistance but conductivity
cell is my conductivity cell filled with
point 1 mole KCl is hundred ohms if the
resistance of same self in with point 0
to M KCl is five twenty home that is
let's suppose it is 0.1 m KCl and this
is point zero 2 m KCl right so this is
my hundred ohms and this is my 520 homes
this is what given right 0.1 m KCl
hundred ohms point one mk7 and o y02
case in 538
calculate the conductivity and the molar
conductivity of this solution if natok I
find conductivity and molar conductivity
of this solution the conductivity of
this solution the point 1 and solution
is given to be 1 point 2 9 the
conductivity is given is to be 1 point 2
9 Siemens per meter please note the unit
this is Siemens per meter so one thing
to notice since they are the two seen
they are to same conductivity cell one
thing that would be common in both will
be cell constant it will be same for
both this constant cell that is nothing
but ly that will be same for both this
cell so if I can find cell constant for
this cell using these values the same
cell cosmic in using this cell in find
out the values correct so I know that
conductivity is nothing but Rho
I'll buy it sorry resistance is nothing
but Rho L by Kurt is nothing but 1 by
conductivity l by a then that is nothing
but 1 by conductivity G star because G
star is nothing but L by cell caution
correct so I know this relation is this
all same actually right or i can also
say Rho into G Star this is one formula
so in this case my resistance is given
all right awesome
this is given and this is what
conductivity that is this K so k is
given so that means this formula is of
no use to me this formula the floor used
to be right because the resistivity
connectivity is given in these two
formulas and I have to find the cell
cons and D star so let me use this
formula it is R is equal to 1 by K into
G Star so let me put the values
resistivity is 100 ohms is equal to 1 by
K K is given this case or in this K is
that fine
resist conductivity you have to find
conductivity 1 by K and K is given here
1.29 s per meter cut this is going to e
2g star so you solve this you get g star
is nothing but hundred homes into 1
point 2 9 Siemens per meter meter
smaller C means into ohms is 1 because I
know that C means nothing but per homes
so when you solve this you get 1 29 per
meter that is my value of cell constant
129 per meter but they are not asking
for this what they asking they ask now
for
this solution this second tallest second
of conductivity cell I have to find the
value walk this conductivity n lambda so
I can use the same formula R is equal to
1 by K into G Star right or this is cell
2 and this is was for cell 1 assuming is
my cell 1 this is my cell so far said to
see anything for sale to resistance is
given 590 ohms is equal to 1 by K I
don't know do G star something I know
129 per meter so you solve this you get
K as nothing but 129 per meter by 520
homes is all this you get 0.42 for 8 1
by Omega thing but Siemens and per meter
is there so this is my conductivity
pretty easy
the next good thing is I have to find
the molar conductivity of this self so I
know my molar conductivity is nothing
but ki by C that is conductivity by
concentration right so here what is my
conductivity conductivity is 0.24 8
Siemens per meter so since it is Siemens
per meter I have to find the right the
concentration in moles per meter cube
please note I have to write in moles per
meter cube but I know the concentration
in moles per liter correct so I know
that the concentration is point zero two
moles per liter and that is our the word
1000 into point zero two moles per meter
cube why because one liter is nothing
but if you see 0.1
metre cube C 1 it is nothing but 10
centimeters cube or 0.1 meter cube so if
you see point 1 1 2 meter cube C 1 liter
is nothing but 10 centimeter cube and
ten zero everything about two point one
meter and there is nothing but point
zero zero zero 1 meter - it's a little I
can I can replace the one inter with
point zero zero one meter cube so you
place liter the big point this is gonna
be tricky that is nothing but you
multiply because nutrition and
denominator means you multiply the whole
thing with one father correct see if you
are confused I can show you here this is
clear right point are volatize nothing
but point zero zero one meter cube right
I can write this CS let me write here
point two moles instead of per liter
alright point zero zero zero one meter
and that is nothing but if you solve
this is nothing but you have to take
this top this is nothing but 1000 in two
point two moles per meter
correct and that's what we have done
1000 into point zero 2 xx point zero two
so we solve this is nothing but 20 moles
point zero into intervals into 1000 is
nothing but 20 moles per meter cube this
becomes 20 moles for it I hope you
understand he just if you have writing
meter the same well it does nothing but
0.1 meter cube that is point zero zero
one that's all and everything we would
take it here
so it will be 2 0 yeah
point 1 cubes point is 2 0
yeah point 1 cave is only 1 point 2 0 1
here so you solve this you get 1 24 into
10 to the power minus 4 Siemens meter
square it was this mid parameter and
meter to one of the meter Eric castle
and you get this as the answer of Maurer
conducting if you want you can find the
same solution in centimeter also here so
in that case what you will get is 124 C
means centimeter square you can actually
directly convert here C 1 meter is
something but tents in Dubai right it's
not it's inhibitor so you say this one
Madrid replace 1 meter square with 100
centimeter square correct so just
replace that so you see that you to
multiply this with 100 centimeter square
is 100 square that is 10 to the power 4
10 to the power 4 into the power minus 1
you can you can directly do the
calculation this is a simple map
actually the next question is the
electrical resistance of column of 0.05
mole per liter
anyway solution on diameter 1 centimeter
and length of T centimeter is this value
this is the resistance you have to find
a resistivity conductivity and boarder
conductivity so this is my solution and
this column is point zero five mole per
liter this is my 2005 moles per liter
eh diameter is 0.5 point on diameter is
1 centimeter that means area if I want
to find here is what PI R square R
becomes 1 by 2 centimeter square this
becomes my area length is what even 50
centimeter please not everything is
intimate from here and the distance is
given 5 point 5 into 10 to power minus 3
ohms resistors is 5 point 5 in 5 into 10
to the power 3 ohms and we had to find
resistivity that is Rho you have to find
resistivity conductivity this K and
molar connect into this lambda correct
the formula you know we know your
resistance is Rho ly the distance is
given Row is conduct register beta V to
find length is given is given let's put
all the values R is nothing but 5 point
5 5 into 10 to the power 3 ohms is equal
to resistivity into length is 50
centimeter by area there is PI into 0.5
square pi is I can write 3.14 so you
solve this equation you get resistivity
as it is seven point one eighty seven
resistivity is 87 point one three five
ohm centimeter because there is over
here and this is centimeter square it's
canceled so we'll get own setting this
is the resistivity if you want to find
conductivity
please don't disperse reduce TD
conductivities kappa nothing but 1 by
row right so this becomes 1 by Rho and
Rho is we have calculated it is seven
point one three i/o Center and this
comes out to be point zero zero 1 4 8 1
by mu becomes Siemens scientific
community centimeter becomes per
centimeter this man conductivity also I
have for it i found conductivity icon
resistivity now I have to find molar
conductivity there is nothing but ki by
C so what is the value of ki point zero
1 1 for a Siemens per centimeter right
now I have to find C the concentration I
have to find a now moles per centimeter
cube now what I know is moles per liter
correct so let me first find that so
concentration I know is point zero five
moles per liter so one liter is nothing
but 10 centimeter cube correct this is
nothing but point zero five by 1000 mole
per centimeter so let us put the values
a point zero five by 1000 mole per
centimeter so we solve this you get go
to nine point six sevens and this
becomes centimeter per centimeter
centimeter q1 gets canceled it becomes
centimeter square per one and that's
nice
just take care the units and you easily
get amps
thank you visit exam viacom to watch
more videos at em free online test get
three study materials find tutors and
mentors and much more thanks once again
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Dec 16, 2024 Last updated |
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