potassium + dichromate + sulphuric acid = potassium sulphate + chromium sulphate + water + oxygen

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Solution

Dear user,
Reaction is as follows :
On treating with concentrated sulphuric acid,oxygen gas is evolved :
$2 K_{2} {Cr}_{2} O_{7} + 8 H_{2} {SO}_{4} \to 2 K_{2} {SO}_{4} + 2 {Cr}_{2} ({SO}_{4})_{3} + 8 H_{2} O + 3 O_{2}$

On treating with dilute sulphuric acid,red crystals of chromic anhydride are formed :
$K_{2} {Cr}_{2} O_{7} + 2 H_{2} {SO}_{4} \to 2 {CrO}_{3} + 2 {KHSO}_{4} + H_{2} O$

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Similar questions

Write the balanced chemical equations of the following reactions.

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(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

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(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

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The products formed when $S O_{2}$ reacts with acidified potassium dichromate solution is :

S O_{2}

S O_{2}

S O_{2}

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