badge image

Enroll For Free Now & Improve Your Performance.

User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 11


Arhenius concept specifies that a substance should be dissolved in water, but why then CO2.SO2,NO2, etc are said to be not explained by arhenius concept when we know that these substances on dissolving in water liberate H+ ions. Same for basic oxides as CaO.

9 years ago

Answers : (1)

879 Points

Dear student,

Please try to understand these facts about Arrhenius theory:

The substance called electrolytes are believed to contain electrically charged particles called ions.    These charges are positive for H+ ion or ions derived from metals and negative for the ions derived    from non-metals. Number of electrical charges carried by an ion is equal to the valency of    corresponding atom.
  Molecules of electrolytes (acids, bases and salts) dissociate into oppositely charged ions on    dissolution in water, e.g.
NaClNa+ +Cl-
HCl H+ +Cl-
NaOH Na+ + OH-
 The number of positive and negative charges on the ions must be equal so that the solution as a    whole remains neutral.
 In solution, the ions are in a state of disorderly or random motion. Upon colliding they may combine to    give unionized molecules. Thus ionization is a reversible process in which the solution contains ions of    electrolyte together with unionized molecules.
H2SO4(aq) 2H+(aq) + SO4-2(aq)
The extent of ionization or the degree of ionization depends upon the nature of electrolyte.Strong    electrolytes such as HCl etc. ionize completely in water. Weak electrolytes such as acetic acid    (CH3COOH) ionize only slightly
 Ionization is not affected by electric current.

 When electric current is passed through an electrolytic solution, charges move towards their    respective electrodes, i.e. cations towards anode and anions towards cathode.When these ions    reached their respective electrodes, they change into neutral species by the gain or loss of electron.


Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..


Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

9 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 141 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details