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Q.

what weight of H2C2O4⋅2H2O (mol. wt. =126) should be dissolved in water to prepare 250 mL of centinormal solution which act as a reducing agent ?

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a

0.63 g

b

0.1575 g

c

0.126 g

d

0.875 g

answer is B.

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Detailed Solution

Normality =1100 (Centinormal)Number of eq. = Normality x Volume (in L)Number of eq. =1100×2501000=1400MassMolar mass×nf×1400As R.A. C2O42−⟶CO2w126×2=1400w =0.1575 g
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