Oxidation reduction processes

Internal

Aluminium

Al^3+

Ammonium

NH4^+

Barium

Ba^2+

Calcium

Ca^2+

Chromium(III)

Cr^3+

Copper(I)

Cu^+

Copper(II)

Cu^2+

Hydrogen

H^+

Iron(II)

Fe^2+

Iron(III)

Fe^3+

Lead(II)

Pb^2+

Lithium

Li^+

Magnesium

Mg^2+

Potassium

K+

Silver

Ag^+

Sodium

Na^+

Tin(II)

Sn^2+

Zinc

Zn^2+

Bromide

Br^-

Carbonate

CO3^2-

Chloride

Cl^-

Chromate

Cr)4^2-

Dichromate

Cr2O7^2-

Fluoride

F^-

Hydrogen carbonate

HCO3^-

Hydrogen sulfite

HSO3^-

Hydroxide

OH^-

Hypochlorite

OCl^-

Iodide

I^-

Nitrate

NO3^-

Oxide

O^2-

Permanganate

MnO4^-

Phosphate

PO4^3-

Sulfate

SO4^2-

Sulfide

S^2-

Sulfite

SO3^2-

Thiocyanate

SCN^-

Thiosulfate

S2O3^2-

MnO4^- colour

Purple aqueous

Anything w/ Sulfur (minus S singular element) colour

Colourless

Anything w/ H colour

Colourless

S colour

Yellow solid

Br₂ colour

red-brown (aq)/+ Red gas

Fe colours

2+ pale green, 3+ pale orange aqueous

MnO_{2 (s)} , XO_{2 (s)} colour

Black-brown

Cu colour

Pink-Orange solid

Cl₂ colour

yellow solution or gas, pungent

Cr³⁺_(aq) colour

Blue-green aqueous

I₂ colour

(aq) yellow-brown - yellow solution/black-brown solid

Cr2O72- colour

orange

NO2 colour

brown gas

What is a redox reactions

transfer of electrons from the oxidised to the reduced species

Oxidation assinging rules

H = +1 unless metal hydides = -1
O = -2 unless H₂O₂ Hydrogen peroxide = -1

Mg, Zn, Fe, Ni, solid colour (metals)

silvery grey

Carbon colour

black solid

Cu+ colour

white aqueous