1.

(a) Write ionic equations for the reaction of acidified potassium permanganate with following: (i) Oxalic acid, (ii) H_(2)S (iii) Sulphite ion. (b) Describe the reactivity of actinoids.

Answer»

Solution :(a) (i) `2MnO_(4)^(-)+ 16H^(+) +5C_(2)O_(4)^(2-) to 2Mn^(2+)+ 8H_(2)O+ 10CO_(2)`
(ii) `2MnO_(4)^(-)+ 16H^(+)+ 5S^(2-)to 2Mn^(2+)+ 8H_(2)O+5S`
(iii)`2MnO_(4)^(-)+ 6H^(+)+ 5SO_(3)^(2-) to 2Mn^(2+)+ 3H_(2)O+ 5SO_(4)^(2-)`
(b) Actinoids are highly reactive metals in the finely divided state DUE to LOW ionisation ENTHALPIES.
eg.(i) They react with boiling water.
(ii) They combine with most of the non-metals at moderate temperatures.
(iii) They are attacked by hydrochloric acid.


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