Multiple choice

4.00 g sample of acid was dissolved in water. Using suitable indicator, it was titrated with 0.5 N NaOH. Exactly, 40 cc were required for neutralization. Calculate the equivalent weight of the organic acid?

  1. 100

  2. 150

  3. 200

  4. 250

  5. 175
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let E be the equivalent wt. of the acid
 ∴ Number of gm eq. of acid = 4/E Number of gm eq. of NaOH = (0.5 x 40)/1000 According to law of equivalence, 4/E = (0.5 x 40)/1000E = (4 x 1000)/(0.5 x 40) E = 200

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