bulkier the group lesser the charge density. is this true?
asking this query in context of acidic strength.. I watched a tutorial where the professor mentioned acidic strength and conjucate base comparison about HF,HCl,HBr,HI..
he mentioned that conjucate base of HI is I- and HI have longest bond so its easier to break the bond AND as I is very huge and "BULKY"....the charge density is less and that stabilizes the system.
(these were his exact words)
so is "bulkier the group lesser the charge density" always valid or only in case of conjucate base type comparison.
In determining the strongest acids, we should take a look at the stability of conjugate base. Since each atom lies in the same column, and the size increases as we move down the group. Therefore charge density decreases down the group.
The formal -1 charge is most concentrated on the smaller atom, making it most willing to share its electrons.
As a result, F- is the strongest base, so it will have the weakest conjugate acid.
on another hand, I- is the weakest base so its conjugate acid is strongest.
Hence, the correct order of acid strength is HI > HBr > HCl > HF
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
You have rated this answer /10
Browse free questions and answers by Chapters
- 1 Classification of Elements and Periodicity in Properties
- 2 Chemical Bonding and Molecular Structure
- 3 States of Matter
- 4 Equilibrium
- 5 Hydrogen
- 6 Hydrocarbons
- 7 Environmental Chemistry
- 8 Solutions
- 9 Chemical Kinetics
- 10 Surface Chemistry
- 11 Biomolecules
- 12 Polymers
- 13 Chemistry in Everyday Life
- 14 Atomic Structure
- 15 Chemical Thermodynamics
- 16 Redox Reactions and Electrochemistry
- 17 p-Block Elements
- 18 d - and f - Block Elements
- 19 Some Basic Principles of Organic Chemistry
- 20 Organic Compounds Containing Halogens
- 21 Organic Compounds Containing Oxygen
- 22 Organic Compounds Containing Nitrogen
- 23 Co-ordination Compounds
- 24 Purification and Characterisation of Organic Compounds
- 25 s-Block Element (Alkali and Alkaline Earth Metals)
- 26 Solid State
- 27 Some Basic Concepts in Chemistry
- 28 General Principles and Processes of Isolation of Metals
- 29 Principles Related to Practical Chemistry
