An excess of NaOH was added to 100 ml of a FeCl3 solution which gives 2.14gm of Fe(OH)3. Calculate the normality of FeCl3 solution.
A
0.2 N
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B
0.3 N
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C
0.6 N
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D
1.8 N
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Solution
The correct option is C 0.6 N 3NaOH(excess)+FeCl3100mL1mmol≡1mmol→Fe(OH)3+3NaCl milli equivalents ofFeCl3≡milli equivalents ofFe(OH)3 M×100≡2.14107×1000 MFeCl3=0.2 NFeCl3=0.2×3 (valency factor =3) =0.6N