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Reaction with Metals

Al and KClO...

Question

$A l$ and $K C l O_{3}$ react together to form $A l_{2} O_{3}$ according to the following reactions :
$2 K C l O_{3} ⟶ 2 K C l + 3 O_{2}$
$4 A l + 3 O_{2} ⟶ 2 A I_{2} O_{3}$
$4$ moles of $K C l O_{3}$ ( $50 %$ pure) on reaction with excess of Al forms _______ moles of $A l_{2} O_{3}$ .

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Solution

$2 K C l O_{3} ⟶ 2 K C l + 3 O_{2}$
$4 A l + 3 O_{2} ⟶ 2 A l_{2} O_{3}$
According to balance reaction 2 mole of $K C l O_{3}$ forms 2 moles of $A l_{2} O_{3}$ .

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(A l = 27)

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