In Kjeldahl's estimation, the evolved ammonia is absorbed in a known volume () of standard acid of n — Qualitative and Quantitative Analysis Chemistry Question
Question
In Kjeldahl's estimation, the evolved ammonia is absorbed in a known volume ($V_1$) of standard acid of normality ($N_1$). The unreacted acid is back-titrated with standard alkali ($N_2, V_2$). The exact milli-equivalents of $NH_3$ produced by the organic compound is mathematically given by the term:
Answer: B
💡 Solution & Explanation
$N_1V_1$ represents the total milli-equivalents of acid initially taken. $N_2V_2$ represents the milli-equivalents of acid that remained unreacted. The difference between them, $N_1V_1 - N_2V_2$, perfectly corresponds to the milli-equivalents of acid that were neutralized by the evolved $NH_3$.
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