Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Calculate its molar conductivity and degree of dissociation (α). Join now. Examples are Sols of inorganic substances like Arsenic (As2S3), Iron (Fe(OH)3 and platinum. Delhi - 110058. This is because of an increase in the number of active ions present in the solution due to concentration. [Co(NH3)6] [Cr(CN)6] are the examples of coordination isomerism. Molar conductivity is defined as the conductivity of the solution of an electrolyte divided by the molar concentration of the electrolyte, and so gauges the efficiency with which an allotted electrolyte conducts electricity in solution. where Λ m o is the molar conductivity at infinite dilution and 'k' is a constant whose value depends on the type of electrolyte used (i.e. Solutions – Definition, Examples, Properties and Types, NCERT Solutions for Class 12 Biology Chapter 5, NCERT Solutions for Class 9 Maths Chapter 12 Heron's Formula, NCERT Solutions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation in Hindi, NCERT Solutions for Class 9 Maths Chapter 12 Heron's Formula In Hindi, NCERT Solutions for Class 9 Maths Chapter 12 Heron's Formula (Ex 12.2) Exercise 12.2, NCERT Solutions for Class 9 Maths Chapter 12 - Heron s Formula Exercise 12.1, NCERT Solutions for Class 8 Social Science Resources and Development, NCERT Solutions for Class 6 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles, Vedantu Download the PDF Sample Papers Free for off line practice and view the Solutions online. 1. A voltaic cell is setup at 25°C with the half cells Ag^+ (0.001 M) Ag and Cu^2+ (0.10 M) Cu. The degree of dissociation is given by,α = Λm / λo here, α is the degree of dissociation, Λm is the molar conductivity λo is the molar conductivity at infinite dilution. Sorry!, This page is not available for now to bookmark. Nevertheless, weak electrolytes carry significantly low values of specific conductivity at lower concentration and the value moderately shows an increase as the concentration is increased. Q2. mol^-1 respectively. The Molar conductance measures at infinite dilution of Na+ and Cl- ions are 32.54 × 10⁻² Sm²mol⁻¹ and 67.12 × 10⁻² Sm²mol⁻¹ respectively. The conductivity of 0.001 mol L-1 solution of CH3COOH is 3.905 x 10-5 S cm-1. MA, M 2 A, MA 2, etc. © However, the increased dilution causes dissociation of more electrolytes into ions and optimally increasing the number of active ions in the concentration. Molar Conductivity Formula. Calculate the degree of dissociation of the weak acid? conductivity will be the same as specific conductivity). The SI unit of molar conductivity is Siemens metre-squared per mole (S m 2 mol −1). Due to the dilution, the number of ions available in a unit volume of the solution decreases. We have givenλo(H+) = 349.6 S cm2mol-1andλ0(CH3COO-) = 40.9 S cm2mol-1then, Now, degree of dissociation (α),α = Λm /Λo= 39.05 / 390.5 = 0.1, Draw the structures of the following :XeF6. Hence, they got easily coagulated on the addition of small amount of electrolyte. Is there any Difference Between Molar Conductance and Molar Conductivity? This isomerism occurs only in those complexes in which both cation and anion are complex. This gives rise to a reduction in conductivity. Lyophobic sol: These are also called irreversible sols and these are unstable and can be easily coagulated due to lack of protecting layer around charged colloidal particles, they easily form a cluster. Check you answers with answer keys provided. Pro Lite, Vedantu Conductivity can also be regarded as the assemblage of ions per unit volume of solution. Ans. Problem1: Find out the molar conductivity of the KCl solution? Practice to excel and get familiar with the paper pattern and the type of questions. In [Ni(H2O)6]+2 shows d-d transition t2g have 6 electrons and eg has 2 with octahedral structure and here d-d transition is allowed so it is coloured. It occurs due to exchange of ligands between cation and anion. You must be aware already that the molar conductivity is the conductivity provided by one mole of ions. If yes, What is the Difference Between Molar Conductance and Molar Conductivity? (Given : Molar mass of Ag = 108 g mol–1 1F = 96500 C mol–1), Given,Molar mass of Ag = 108 g mol–1 1F = 96500 C mol–1, Q=ItQ= 2×15×60=1800 CW(weight of substance deposited)= ZQZ= M/nFn-factor here is 1So Z = 108/1×96500, =2.01 gThe mass of Ag deposited at the cathode is2.01 g. A fuel cell is a device that produces electrical energy through a chemical reaction between a source fuel and an oxidant. Consider taking 1cc of the solution having 1 g eq. Write one difference in each of the following:Solution and Colloid, A 10% solution (by mass) of sucrose in water has the freezing point of 269.15 K.Calculate the freezing point of 10% glucose in water if freezing point of pure water is273.15 K.Given : (Molar mass of sucrose = 342 g mol–1) (Molar mass of glucose = 180 g mol–1), Given,T1=269.15 KT2 = 273.15Molar mass of sucrose = 342 g mol–1Molar mass of glucose = 180 g mol–1ΔTf = Kf mHere , m = w2x 1000/ M2XM1273.15-269.15 = Kf x 10 x1000/ 342 x90Kf = 12.3 K kg/molΔTf = Kf m= 12.3 x 10 x1000/ 180x90= 7.6 KTf = 273.15 – 7.6 = 265.55 K, Calculate the degree of dissociation (a) of acetic acid if its molar conductivity (Λm) is 39.05 S cm2mol–1. The below-given expression is used to mathematically denote molar conductivity. Therefore, when considering 1cc of the solution having 1 gm equivalent of the electrolyte, the equivalent conductivity will be equal to its specific conductivity. The molar conductivity of an electrolyte solution is defined as its conductivity divided by its molar concentration. CBSE Class 12 Chemistry Solved Question Paper 2017, Class 11 NCERT Political Science Solutions, Class 11 NCERT Business Studies Solutions, Class 12 NCERT Political Science Solutions, Class 12 NCERT Business Studies Solutions, https://www.zigya.com/share/Q0hFTjEyMTQ1ODI3. Ans: Understand this by considering an example. Even after dilution, we are taking into account the same unit mole of ions. Calculate the mass of Ag deposited at cathode when a current of 2 amperes was passed through a solution of AgNO3 for 15 minutes. The si unit of molar conductivity is S⋅m²⋅mol⁻¹. What Happens to Molar Conductance Equivalent and Molar Equivalent Conductivity on Dilution? Thus, as dilution increases, Molar Conductivity (conductance of 1 mole of electrolyte in total solution) should INCREASE in compliance with Ostwald's Law. Also according to the definition of equivalent conductivity is the conductance of 1g eq. Write the IUPAC name of the following complex : [Co(NH3)5(CO3)]Cl.
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