Calculate the amount of ferrous ion present in a solution, if the volume of 0.1N potassium dichromate consumed for 20ml of ferrous ion solution is 12.4 ml
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The valency factor for K2
Cr2O7
is 6.
N/1
V/1
=N/2
V/2
⟹0.2×50=N/2×40
⟹N/2=40/10=4/1
⟹N2=(M.wt)w×eq.factor×V(lit)1
⟹4/1=56/w×1×1
⟹w= 4/56
⟹w=14g
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