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Some Basic Concepts Of Chemistry

Question
CBSEENCH11005061

Balance the following skeleton equation by hit and trial method:
Fe subscript 3 straight O subscript 4 plus straight H subscript 2 space rightwards arrow space Fe plus straight H subscript 2 straight O

Solution
(i) The skeleton equation in the atomic form may be written as
Fe subscript 3 straight O subscript 4 plus straight H space rightwards arrow space Fe plus space straight H subscript 2 straight O
(ii) To equalise the number of atoms of Fe and O on both side, multiply Fe by 3 and the molecule H2O by 4.
Fe subscript 3 straight O subscript 3 plus straight H space rightwards arrow space 3 Fe plus 4 straight H subscript 2 straight O
(iii) To equalise hydrogen atom, multiply H atom by 8 on L.H.S.
Fe subscript 3 straight O subscript 4 plus 8 straight H space rightwards arrow space 3 Fe plus 4 straight H subscript 2 straight O
(iv) Making the equation molecular to get the balanced equation,
Fe subscript 3 straight O subscript 4 plus 4 straight H subscript 2 space rightwards arrow space 3 Fe plus 4 straight H subscript 2 straight O