The equivalent weight of oxalic acid in C2H2O4⋅2H2O is

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NDA (Held On: 21 April 2019) General Ability Test Previous Year paper
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  1. 45
  2. 63
  3. 90
  4. 126

Answer (Detailed Solution Below)

Option 2 : 63
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The equivalent weight of oxalic acid in C2H2O4⋅2H2O is 63.

  • The molecular weight of oxalic acid (C2H204) is 90.
  • But since Oxalic Acid exists with 2 molecules of water, hence molecular weight of Oxalic acid (C2H2O4⋅2H2O) = 126
  • Now, Equivalent weight = Molecular weight/Basicity
  • Therefore, Equivalent Weight = 126/2 = 63 (As 2 is the basicity)
  • Basicity here means Oxalic Acid release 2 H+ ions
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