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Potassium Permanganate

1g of KClO3 w...

Question

1g of KClO3 was heated under such conditions that a part of it decomposed according to the equation, 2KClO3 gives 2KCl+3O2 and the remaining decomposed as 4KClO3 gives 3KClO4+KCl. If the O2 evolved was 146.8ml at STP, calculate the % by weight of KClO4 in the residue.

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1.0

K C l O_{3}

2 K C l O_{3} \to 2 K C l + 3 O_{2}

4 K C l O_{3} \to + 3 K C l O_{4} + K C l

O_{2}

146.8

K C l O_{4}

K C l O_{3}

2 K C l O_{3} = 2 K C l + 3 O_{2}

4 K C l O_{3} = 3 K C l O_{4} + K C l

O_{2}

K C l O_{4}

K C l O_{3}

(i) 2 K C l O_{3} \to 2 K C l + 3 O_{2}

(i i) 4 K C l O_{3} \to 3 K C l O_{4} + K C l

K C l O_{4}

K C l O_{3}

O_{2}

K C l O_{4}

(Molar mass of K C l O_{3} = 122.5 g m o l^{- 1}, K C l O_{4} = 138.5 g m o l^{- 1}) K C l O_{3} \to K C l + O_{2} K C l O_{3} \to K C l O_{4} + K C l

K C l O_{3}

O_{2}

K C l O_{4}

(Molar mass of K C l O_{3} = 122.5 g m o l^{- 1}, K C l O_{4} = 138.5 g m o l^{- 1}) K C l O_{3} \to K C l + O_{2} K C l O_{3} \to K C l O_{4} + K C l

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