Potassium permanganate
`KMnO_(4)+______ to_____+_____+______+Cl_(2)`

Write balanced redox reactions for each of the following reactions: (a) Potassium dichromate (K_(2)Cr_(2)O_(7)) reacts with hydroiodic acid (HI) to produce potassium iodide, chromium (III) iodide, and solid iodine, I_(2)(s) . (b) A purple solution of aqueous potassium permanganate (KMnO_(4)) reacts with aqueous sodium sulphite (Na_(2)SO_(3)) in basic solution to yield the green magnanate ion (MnO_(4)^(2-)) and sulphate ion (SO_(4)^(2-)) . (c ) Sn^(2+) (aq) reduce I_(4)^(Ө)(aq) to I^(Ө)(aq) and is oxidised to Sn^(4+) . (d) H_(2)O_(2)(aq) oxidises Mn^(2+)(aq) to MnO_(2) in basic medium. (e) H_(2)O_(2)(aq) reduces Cr_(2)O_(7)^(2-) (aq) to green coloured Cr^(3+)(aq) in acidic medium.

How will you obtain pure potassium permanganate (KMnO4_) crystals from its ore, pyrosulfite ? Give the steps involved and the reactions.

Assertion (A) : Pink coloured solution of potassium permanganate turns green on passing O_3 through it. Reason (R) : K_2MnO_4 is oxidised by O_3 to KMnO_4 .

Assertion : In titrations involving potassium permanganate no indicator is used. Reason : MnO_(4)^(-) acts as the self-indicator.

The rate of oxidation of oxalic acid by acidified potassium permanganate is shown in the given graph. 5H_2C_2O_4+2KMnO_4 +3H_2SO_4rarr2MnSO_4+K_2SO_4+10CO_2+8H_2O The type of catalyst shown by such reaction is

Write balanced chemical equations for: (i) Mixture of K_(2)Cr_(2)O_(7) and NaCl is heated with concentrated H_(2)SO_(4) . (ii) Potassium permanganate is added to a hot solution of manganous sulphate. (iii). Potassium dichromate and concentrated HCl are heated together.

In permanganate titrations, potassium pemanganats is used an an oxidizing agent in acidic medium. The medium is maintained acidic by the use of dilute sulphuric acid. Potassium permanganate acts as self indicator . The potential equation, when potassium permanganate acts as an oxidizing agent is 2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5[O] or MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4H_(2)O Before the end point, the solution remains colourless but after teh equivalence point only one extra drop of KMnO_(4) solution imparts pink colour , i.e. appearance of pink colour indicates end point. These titrations are used for estimation of ferrous salts, oxalic acid, oxalates, hydrogen peroxide, As_(2)O_(3) etc. In order to prepare one litre of normal solution of KMnO_(4) , how many grams of KMnO_(4) is required if solution is to be used in acid medium for oxidation ?

In permanganate titrations, potassium pemanganats is used an an oxidizing agent in acidic medium. The medium is maintained acidic by the use of dilute sulphuric acid. Potassium permanganate acts as self indicator . The potential equation, when potassium permanganate acts as an oxidizing agent is 2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5[O] or MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4H_(2)O Before the end point, the solution remains colourless but after teh equivalence point only one extra drop of KMnO_(4) solution imparts pink colour , i.e. appearance of pink colour indicates end point. These titrations are used for estimation of ferrous salts, oxalic acid, oxalates, hydrogen peroxide, As_(2)O_(3) etc. Mass of KHC_(2)O_(4) (potassium acid oxalate ) required to reduce 100 ml of 0.02 KMnO_(4) in acidic medium (MnO_(4)^(-)" changes to " Mn^(2+)) is x gm and to neutralize 100 ml of 0.05M Ca(OH)_(2) is y gm ,then

In permanganate titrations, potassium pemanganats is used an an oxidizing agent in acidic medium. The medium is maintained acidic by the use of dilute sulphuric acid. Potassium permanganate acts as self indicator . The potential equation, when potassium permanganate acts as an oxidizing agent is 2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5[O] or MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4H_(2)O Before the end point, the solution remains colourless but after teh equivalence point only one extra drop of KMnO_(4) solution imparts pink colour , i.e. appearance of pink colour indicates end point. These titrations are used for estimation of ferrous salts, oxalic acid, oxalates, hydrogen peroxide, As_(2)O_(3) etc. In alkaline condition, KMnO_(4) reacts as follows : 2KMnO_(4) + 2KOH to 2K_(2)MnO_(4) + H_(2)O + [O] Therefore , its equivalent mass will be

In permanganate titrations, potassium pemanganats is used an an oxidizing agent in acidic medium. The medium is maintained acidic by the use of dilute sulphuric acid. Potassium permanganate acts as self indicator . The potential equation, when potassium permanganate acts as an oxidizing agent is 2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5[O] or MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4H_(2)O Before the end point, the solution remains colourless but after teh equivalence point only one extra drop of KMnO_(4) solution imparts pink colour , i.e. appearance of pink colour indicates end point. These titrations are used for estimation of ferrous salts, oxalic acid, oxalates, hydrogen peroxide, As_(2)O_(3) etc. For decolourization of 1 mol of KMnO_(4) , the number of moles of H_(2)O_(2) required is