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Limiting Reagent or Reactant

How many mole...

Question

How many moles of $K O H$ are required per mole of $R - N H_{2}$ in the balanced reaction?
$R - N H_{2} + C H C l_{3} + K O H \to R - \oplus N ⊖ C + K C l + H_{2} O$

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Solution

$C H C l_{3} + K O H \to: C C l_{2}$

$R - N H_{2} + : C C l_{2} \to R - \oplus N H_{2} - ⊖ C C l_{2}$

$R - \oplus N H_{2} - ⊖ C C l_{2} \pm H - - \to R - N H - C H C l_{2}$

$R - N H - C H C l_{2} K O H - -- \to - K C l R - N = C H C l$

$R - N = C H C l K O H - -- \to - K C l R - \oplus N ⊖ C$

$∴$ 3 moles of $K O H$ are required in carbylamine test.

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