• AglaSem
  • Schools
  • Admission
  • Career
  • CutOffs
  • News
  • Hindi
  • Mock Test
  • Docs
  • ATSE
aglasem
  • CBSE
    • Date Sheet
    • Question Papers
    • Sample Papers
  • ICSE / ISC
  • State Boards
    • Date Sheet
    • Result
  • NCERT
    • NCERT Books
    • NCERT Solutions
    • NCERT Exempler
    • Teaching Material
  • Mock Tests
  • Study Material
    • Notes
  • Olympiads
    • ATSE
    • KVPY
    • NTSE
    • NMMS
  • School Admission
  • Entrance Exams
    • JEE Main
    • NEET
    • CLAT
  • Students Guide
    • Careers Opportunities
    • Courses & Career
    • Courses after 12th
  • Others
    • HC Verma Solutions
    • Teaching Material
    • Classes Wise Resources
    • Videos
    • Resources
No Result
View All Result
aglasem
  • CBSE
    • Date Sheet
    • Question Papers
    • Sample Papers
  • ICSE / ISC
  • State Boards
    • Date Sheet
    • Result
  • NCERT
    • NCERT Books
    • NCERT Solutions
    • NCERT Exempler
    • Teaching Material
  • Mock Tests
  • Study Material
    • Notes
  • Olympiads
    • ATSE
    • KVPY
    • NTSE
    • NMMS
  • School Admission
  • Entrance Exams
    • JEE Main
    • NEET
    • CLAT
  • Students Guide
    • Careers Opportunities
    • Courses & Career
    • Courses after 12th
  • Others
    • HC Verma Solutions
    • Teaching Material
    • Classes Wise Resources
    • Videos
    • Resources
No Result
View All Result
aglasem
No Result
View All Result

Class 11 Chemistry Notes Stocihiometry – Balancing of Equations

by Anand Meena
April 22, 2019
in 11th Class, Class Notes
Reading Time: 2min read
0
2
SHARES
0
VIEWS
Share on FacebookShare on Twitter

Balancing of Equations:

  1. Ion-electron method
  2. Oxidation number method
    [Concept involved that in any chemical reaction e– cannot be produced so no. of e– s in O.H. & R.H. should be same]

 Note : To predict the product of reaction remember:

  • Free halogen on reduction gives halide ion (F2 → F–)
  • Alkali metals on oxidation give metallic ion with +1 oxidation state.
  • In alkaline medium KMnO4 is reduced to K2MnO4 but in strong alkaline or neutral medium it reduces of  Mn+4
  • In acid solution KMnO4 is reduced to Mn2+
  • H2O2 on reduction gives water and on oxidation gives oxygen.
  • Dichromate ion in acid solution is reduced to Cr3+.

Nature of Oxides Based on Oxidation Number:

Lowest oxidation state                      →        Basic                     (MnO)
Intermediate oxidation state         →        Amphoteric       (Mn3O4, MnO2)
Highest oxidation state                     →        Acidic                  (Mn2O7)

Rules For Assigning Oxidation Number:

  1. Oxidation number of free elements or atoms is zero.
  2. Oxidation number of allotropes is zero.
  3. Oxidation number of atoms in homo-nuclear molecules is zero.
  4. Oxidation number of mono-atomic ions is equal to the algebraic charge on them.
  5. Oxidation number of F in compounds is – 1
  6. Oxidation number of H in its compounds is +1, except in metal hydrides where it is-1
  7. Oxidation number of O is-2in its compound, but in and in peroxides it is 1 and -0.5 in KO2
  8. Oxidation number of alkali metals in their compounds + 1.
  9. Oxidation number of alkaline earth metals in their compounds is + 2.
  10. The sum of oxidation number of all the atoms in a molecule should be zero and in an ion equal to its charge.

Average Oxidation Number : Find Oxidation Number of Fe in Fe3O4.

Fe3O4 is FeO. Fe2O3
O.N. of Fe in FeO is + 2         ;           O.N. of Fe in Fe2O3 is + 3.

Therefore average O.N. of three Fe atoms (+2 + 2x (+3))/3 = +(8/3)

« Click Here for Previous Topic Click Here for Next Topic »

Click Here for Class XI Classes Chemistry All Topics Notes

To get fastest exam alerts and government job alerts in India, join our Telegram channel.

Tags: Average Oxidation NumberBalancing of EquationsCBSE 11 NotesCBSE Class XI Chemistry NotesCBSE NotesClass 11 NotesClass 11thClass 11th NotesClass XI Chemistry NotesClass XI Stocihiometry NotesFree NotesNCERT Class NotesRules For Assigning Oxidation NumberStocihiometry Notes

Anand Meena

Full time entrepreneur, likes to indulge in writing reviews about the latest technologies apart from helping students in career and exam related topics.

Related Posts

11th Class

BHU SET 2021 – Application Form (Available), Dates, Notification

KVPY 2020
11th Class

KVPY 2020 – Kishore Vaigyanik Protsahan Yojana Tentative Answer Key (Out), Result

11th Class

FYJC Admission 2020 – 21: 11th Admission, FCFS Round Schedule (Published, 11thadmission.org.in

10th Class

IARCS Olympiads: Indian Association for Research in Computing Science

Next Post
Class 11 Chemistry Notes General Organic Chemistry - AglaSem

Class 11 Chemistry Notes GOC - Benzyl Free Radical and Free Radical Problems

Discussion about this post

Registration Open!!

Indian Talent Olympiad Click Here
Indian Talent Olympiad - Apply Now!!

Class Wise Study Material

  • Class 1
  • Class 2
  • Class 3
  • Class 4
  • Class 5
  • Class 6
  • Class 7
  • Class 8
  • Class 9
  • Class 10
  • Class 11
  • Class 12
  • Disclaimer
  • Terms of Use
  • Privacy Policy
  • Contact

© 2019 aglasem.com

No Result
View All Result
  • CBSE
  • ICSE / ISC
  • State Board
  • NCERT
  • Mock Test
  • Study Material
  • Olympiads
  • Schools Admission
  • Entrance Exams
  • Student Guide
  • HC Verma Solutions
  • Videos

© 2019 aglasem.com

Indian Talent Olympiad Click Here
Indian Talent Olympiad - Apply Now!!