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0.126 g of acid required 20 mL of 0.1 N NaOH for complete neutralisation. The equivalent mass of an acid is
  • a)
    45
  • b)
    53
  • c)
    40
  • d)
    63
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
0.126 g of acid required 20 mL of 0.1 N NaOH for complete neutralisati...
Calculation of Equivalent Mass of Acid
- Given data:
- Volume of NaOH used = 20 mL = 0.02 L
- Normality of NaOH = 0.1 N
- Mass of acid = 0.126 g
- Molar mass of NaOH = 40 g/mol
- Number of equivalents of NaOH used = Normality * Volume (in L) = 0.1 * 0.02 = 0.002 equivalents
- Number of equivalents of acid = Number of equivalents of NaOH (since they react in 1:1 ratio) = 0.002 equivalents

Calculating Equivalent Mass
- Equivalent mass is defined as the mass of a substance that supplies one equivalent of the species of interest.
- Equivalent mass of acid = Mass of acid / Number of equivalents of acid
- Equivalent mass of acid = 0.126 g / 0.002 equivalents
- Equivalent mass of acid = 63 g/equivalent
Therefore, the correct answer is option 'D' with an equivalent mass of acid equal to 63 g.
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0.126 g of acid required 20 mL of 0.1 N NaOH for complete neutralisation. The equivalent mass of an acid isa) 45 b) 53 c) 40 d) 63 Correct answer is option 'D'. Can you explain this answer?
Question Description
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