
Define the following and write the formula and unit of each:
(A) Specific Conductivity.
(B) Molar Conductivity.
Answer
408.3k+ views
Hint :We know that equivalent conductance is defined as the conductance of all the ions produced by one-gram equivalent of an electrolyte in a given solution. In case, if the concentration of the solution is c gram equivalent per litre, then the volume containing $ 1 $ g equivalent of the electrolyte will be $ 1000/e. $
Complete Step By Step Answer:
Specific Conductivity: It decreases with a decrease in concentration. As the number of ions per unit volume that carry current in a solution decreases on dilution. Thus, concentration and conductivity are directly proportional to each other. Specific Conductance is the conductance of a given solution enclosed in a cell having two electrodes which are of unit area and are separated by $ 1cm. $
Formula - $\kappa = \dfrac{1}{\rho} = \dfrac{1}{A} \times \dfrac{l}{R}$
Where, $\rho = \;specific\;resistance$
$l = \;length$
$A = \;Area$
$R= \;Resistance$
Unit - $Ohm^{-1}\;cm^{-1}$
Molar conductivity: It is the conductance property of a solution containing one mole of the electrolyte or it is a function of the ionic strength of a solution or the concentration of salt. It is therefore not a constant. In other words, molar conductivity can also be defined as the conducting power of all the ions that are formed by dissolving a mole of electrolyte in a solution. Molar conductivity is the property of an electrolyte solution that is mainly used in determining the efficiency of a given electrolyte in conducting electricity in a solution. It is therefore not a constant.
Formula - $\mu = \kappa \times V$
$\mu = \kappa \times \dfrac{1000}{m}$
Where, $\mu = \;molar\;conductivity$
$\kappa = \;specific\;conductivity$
$m = \;molarity$
$V= \;volume$
Unit - $Ohm^{-1}\;cm^{2}\;mol^{-1}$
Note :
Remember that we should also know the effect of concentration on molar conductivity. The molar conductivity of both weak and strong electrolytes increases with a decrease in concentration or dilution. We know that the molar conductivity is the conductivity offered by one mole of ions.
Complete Step By Step Answer:
Specific Conductivity: It decreases with a decrease in concentration. As the number of ions per unit volume that carry current in a solution decreases on dilution. Thus, concentration and conductivity are directly proportional to each other. Specific Conductance is the conductance of a given solution enclosed in a cell having two electrodes which are of unit area and are separated by $ 1cm. $
Formula - $\kappa = \dfrac{1}{\rho} = \dfrac{1}{A} \times \dfrac{l}{R}$
Where, $\rho = \;specific\;resistance$
$l = \;length$
$A = \;Area$
$R= \;Resistance$
Unit - $Ohm^{-1}\;cm^{-1}$
Molar conductivity: It is the conductance property of a solution containing one mole of the electrolyte or it is a function of the ionic strength of a solution or the concentration of salt. It is therefore not a constant. In other words, molar conductivity can also be defined as the conducting power of all the ions that are formed by dissolving a mole of electrolyte in a solution. Molar conductivity is the property of an electrolyte solution that is mainly used in determining the efficiency of a given electrolyte in conducting electricity in a solution. It is therefore not a constant.
Formula - $\mu = \kappa \times V$
$\mu = \kappa \times \dfrac{1000}{m}$
Where, $\mu = \;molar\;conductivity$
$\kappa = \;specific\;conductivity$
$m = \;molarity$
$V= \;volume$
Unit - $Ohm^{-1}\;cm^{2}\;mol^{-1}$
Note :
Remember that we should also know the effect of concentration on molar conductivity. The molar conductivity of both weak and strong electrolytes increases with a decrease in concentration or dilution. We know that the molar conductivity is the conductivity offered by one mole of ions.
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
Which are the Top 10 Largest Countries of the World?

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Draw a labelled sketch of the human eye class 12 physics CBSE

What is a transformer Explain the principle construction class 12 physics CBSE

What are the major means of transport Explain each class 12 social science CBSE

What is the Full Form of PVC, PET, HDPE, LDPE, PP and PS ?
