English
Karnataka Board PUCPUC Science 2nd PUC Class 12

When acidulated water (dil.H2SO4 solution) is electrolysed, will the pH of the solution be affected? Justify your answer.

Advertisements
Advertisements

Question

When acidulated water (dil.H2SO4 solution) is electrolysed, will the pH of the solution be affected? Justify your answer.

Short/Brief Note
Advertisements

Solution

Anode: \[\ce{2H2O(l) -> O2(g) + 4H + (aq) + 4e^{-}}\]

Cathode: \[\ce{4H^{+} + 4e^{-} -> 2H2}\]

Overall cell reaction: \[\ce{2H2O(l) -> O2(g) + 2H2(g)}\]

pH remains the same because concentration of H+ ions remains constant.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Electrochemistry - Exercises [Page 40]

APPEARS IN

NCERT Exemplar Chemistry Exemplar [English] Class 12
Chapter 3 Electrochemistry
Exercises | Q III. 42. | Page 40

RELATED QUESTIONS

Define “Molar conductivity”.


State Kohlrausch’s law of independent migration of ions.


State Kohlrausch Law.


Define limiting molar conductivity.


Define the following terms: Molar conductivity (m)


Conductivity of 0.00241 M acetic acid is 7.896 × 10−5 S cm−1. Calculate its molar conductivity and if `Lambda_m^0` for acetic acid is 390.5 S cm2 mol−1, what is its dissociation constant?


Define the following terms :

Limiting molar conductivity


The S.I. unit of cell constant for conductivity cell is __________.


Assertion: Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.

Reason: For weak electrolytes degree of dissociation increases with dilution of solution.


Assertion: `"E"_("Ag"^+ //"Ag")` increases with increase in concentration of Ag+ ions.

Reason: `"E"_("Ag"^+ //"Ag")` has a positive value.


Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The Λm of ‘B’ increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer. Graphically show the behavior of ‘A’ and ‘B’.


An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to :-


Which of the following increases with the increase in the concentration of the solution?


The solubility of Co2[Fe(CN)6] in water at 25°C from the following data:

Conductivity of saturated solution of Co2[Fe(CN)6] = 2.06 × 10−6 ohm−1 cm−1 and that of water = 4.1 × 10−7 ohm−1 cm−1. The ionic molar conductivities of Co2+ and [Fe(CN)6]4− are 86 and 444 ohm−1 cm2 mol−1 respectively, is ______ × 10−6 mol/L.


The variation of molar conductivity with concentration of an electrolyte (X) m aqueous solution is shown in the given figure.

The electrolyte X is ______.


Which of the following solutions of KCl will have the highest value of molar conductivity?


Conductivity of 2 × 10−3 M methanoic acid is 8 × 10−5 S cm−1. Calculate its molar conductivity and degree of dissociation if `∧_"m"^0` for methanoic acid, is 404 S cm2 mol−3.


Assertion (A): Molar conductivity decreases with increase in concentration.

Reason (R): When concentration approaches zero, the molar conductivity is known as limiting molar conductivity.


The unit of molar conductivity is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×