Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The degree of dissociation of a weak electrolyte increases Ask for details ; Follow Report by Panky2 25.03.2018 Log in to add a comment bhi. (i) Both assertion and reason are true and the reason is the correct explanation of assertion. C K dis Reason R: Weak electrolytes at moderate concentrations dissociate to a much greater extent as compared to strong electrolytes. Solution: The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. NEET 2021 will be conducted in the first week of May 2021. ... As a result, the diffusion coefficient of this gas increases x times. Know steps to download MPBSE syllabus & complete details related to the MP board exam 2021! Algebraic Thus, the degree of dissociation can be calculated at any concentration α = Λmc / Λm°
Reason : For weak electrolytes degree of dissociation increases with dilution of solution.
Explanation The number of particles increases in solution due to electrolytic dissociation. Electrolyte conductivity increases with a rise in temperature, as the viscosity of the solvent decreases exponentially, and the degree of dissociation increases. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. The dissociation of weak electrolyte (a weak base or weak acid) id expressed in terms of Ostwald dilution law. Question From class 12 Chapter Electrochemistry, Both assertion and reaction are true and the reason is correct explanation for assertion, Both assertion and reason are true and reason is not correct explanation for assertion. ) Check complete JEE Main 2021 exam update and other important details related to exams! equilibrium constant, called the dissociation constant. (iv) Both assertion and reason are false. NEET 2020 - 5 MBBS Seats Reserved for Wards of COVID-19 Warriors. of Parallelograms and Triangles, Introduction Apne doubts clear karein ab Whatsapp (8 400 400 400) par The degree of dissociation of a weak electrolyte AxBy is related to van t Hoff factor i by the expression.
Reason. Reason : For weak electrolytes degree of dissociation increases with dilution of solution. The ESR at −30 °C increases by a factor of 2–7 in comparison with room temperature, among other things, due …
Statement-2: No. Weak electrolytes have lower molar conductivities and lower degree of dissociation at higher concentrations which increases steeply at lower concentrations. At infinite dilution, the percentage ionisation for both strong and weak electrolytes is. As week electrolyte dissociation degree tends to zero α =>0 and (1- α)=1: K dis = α2•C. Expressions and Identities, Direct For weak electrolytes, however, the molar conductivity shoots at lower concentrations. Reason is the correct explanation for assertion. CBSE has reduced the syllabus for class 10 & 12 exam 2021, date sheet can release soon. to Euclids Geometry, Areas In the following questions a statement of assertion followed by a statement of reason is given. Give reason . Know MHA unlock guidelines, unlock 6.0 & education institutions guidelines. MP Board Exam 2021 - MPBSE Reduces Class 10, 12 Syllabus by 30 Percent. Here NH 4 + ions are common hence their concentration increases. Statement-1: Molar conductivity increases with decrease in concentration for weak electrolytes. of Integrals, Continuity Assertion : Conductivity of all electrolytes decreases on dilution. and Differentiability. Assertion is true but the reason is False. Assertion : The molar conductance of weak electrolytes at infinite dilution is equal to sum of the molar conductances of cation and anion. acetic acid (CH 3COOH), dissociation constant and degree of dissociation (α) interconnected by the expression: 2 1 c K α = −α This equation is known as Ostwald's dilution law, it is applicable for weak 1-1 electrolytes only. Assertion : Λ m for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Ostwald’s dilution law α= is on 1886 in Riga proved discovery if concentration C decreases dissociation degree α increases and remains pH=const. As the amount of water increases more and more electrolyte solution dissociates therefore its degree of dissociation increases. (iii) Assertion is true but the reason is false. CBSE Class 12 Exam 2021 - Exam Pattern and New Marking Scheme. The Λm of ‘B’ increases 1.5 times. So it increases with increasing dilution. Assertion. Degree of ionization is inversely proportional to molar concentration. The value of x is . Know exam pattern, new marking scheme, sample paper & more. The degree of dissociation in a weak electrolytic increases. Where ‘K b ’ is dissociation constant of the base.. At infinite dilution, the percentage ionisation of both strong and weak electrolytes is. and Inverse Proportions, Areas JEE Main 2021: January Session likely to be postponed to February. This preview shows page 49 - 69 out of 69 pages.. (1)Fraction of dissociation of a weak electrolyte increases as electrolyte is diluted. for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. With the increase in dilution, the degree of dissociation increases and as a result molar conductance increases. How does dilution affect the conductivity of strong electrolytes and weak electrolytes ? to Three Dimensional Geometry, Application NH 4 Cl (aq) → NH 4 + (aq) + Cl – (aq). The degree of dissociation ... chemistry The degree of dissociation ( α ) of a weak electrolyte, A x B y is related to van't Hoff factor ( i ) by the expression : Reason : For weak electrolytes degree of dissociation increases with dilution of solution… For e.g.
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