Are these Redox Reactions notes free?

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What does the Redox Reactions revision sheet cover?

Classical and electron-transfer pictures, Oxidation number: the bookkeeping rule, Fixed oxidation number rules, Worked: oxidation number of S in SO2 and in the sulfate ion, Stock notation, Fractional oxidation numbers, Oxidising agent vs reducing agent, Oxidising agent, Reducing agent, Balancing by the oxidation number method, Worked: CuO + NH3, oxidation number method, Balancing by the ion-electron (half-reaction) method.

Is this for Class 11 Maharashtra HSC Chemistry?

Yes, it is written for the Maharashtra HSC Chemistry syllabus.

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Redox Reactions — Class 11 Maharashtra HSC Chemistry revision notes

A 5-page visual revision sheet for Redox Reactions, written for Class 11 Maharashtra HSC Chemistry. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.

Redox Reactions revision notes, page 1 of 5 — A preview of page 1 — all 5 pages open full size in the app.

Redox Reactions in one look

one species loses electrons, another gains them, in the same breath

Classical and electron-transfer pictures

classically: oxidation adds oxygen/electronegative element or removes hydrogen/electropositive element; reduction is the reverse
modern: oxidation is loss of electrons, reduction is gain; the two always happen together, never alone
oxidant: itself gets reduced, the electron acceptor. reductant: itself gets oxidised, the electron donor
covalent reactions (2H_2+O_2→2H_2O) fit too: an electron shift, not a full transfer, toward the electronegative atom

Oxidation number: the bookkeeping rule

oxidation number: the charge an atom would carry if every bond to it were fully ionic
free element: always 0 (H_2, Cl_2, O_3, S_8, P_4, Ca metal)
monatomic ion: equals its charge (alkali +1, alkaline earth +2, Al +3)
neutral molecule: oxidation numbers sum to 0. polyatomic ion: sum to the net charge
when an element appears more than once in one species, report the average oxidation number

Fixed oxidation number rules

species	usual O.N.	exception
O	-2	-1 peroxide (H_2O_2); -1/2 superoxide (KO_2); +2 in OF_2
H bonded to non-metal	+1	-1 in a metal hydride, e.g. LiH, CaH_2
F	-1	none, always -1
Cl, Br, I in a halide	-1	+1 when bonded to O, e.g. Cl-O-Cl

Page 1 of 5. The full sheet, all 5 pages, opens free in the app.

What this Redox Reactions sheet covers

Classical and electron-transfer pictures
Oxidation number: the bookkeeping rule
Fixed oxidation number rules
Worked: oxidation number of S in SO2 and in the sulfate ion
Stock notation
Fractional oxidation numbers
Oxidising agent vs reducing agent
Oxidising agent
Reducing agent
Balancing by the oxidation number method
Worked: CuO + NH3, oxidation number method
Balancing by the ion-electron (half-reaction) method
Worked: MnO4- with Fe2+, acidic medium
Redox couples and standard electrode potential
Standard electrode potentials, selected couples
Predicting spontaneity from E-naught
write reduction for one species, oxidation for the other, flip the sign of E° for the oxidation step, then sum
Fe^3++I^-: reduction +0.77 V, oxidation of I^- reversed gives -0.54 V
Ag^++Cu(s): reduction +0.80 V, oxidation of Cu reversed gives -0.34 V
Redox titrations
Traps that cost marks
Tricks that save time

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