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Halogen Exchange Reactions

99. 3.9g of a...

Question

99. 3.9g of a mixture of Al and Al2O3, when reacted with a sol. of NaOH, produced 840 ml of a gas at NTP. Then prove that the composition of Al in mix. is !7.3%.

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3.90

A l

{A l}_{2} O_{3}

N a O H

840

%

A l

3.90

A l

{A l}_{2} O_{3}

N a O H

840

%

A l_{2} O_{3}

When NaOH reacts with Aluminium metal, following reaction occurs:

$N a O H + A l \to N a [A l (O H)_{4}] + Y$

If Y is a gas, identify it.

27 g m A l

49 m l

H_{2} S O_{4}

= 2

H_{2}

A l

H_{2} S O_{4}

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