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Preparations and Uses of Sodium Bicarbonate and Common Salt

Which is form...

Question

Which is formed when $K_{2} C r_{2} O_{7}, C a C l_{2}$ , and conc. $H_{2} S O_{4}$ are heated?

A

C r_{2} (S O_{4})_{3}

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B

C r C l_{3}

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C

C r O_{2} C l_{2}

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D

K_{2} C r O_{4}

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Solution

The correct option is C $C r_{2} (S O_{4})_{3}$
When $K_{2} C r_{2} O_{7}, C a C l_{2}$ , and conc. $H_{2} S O_{4}$ are heated, $C r_{2} (S O_{4})_{3}$ is formed.
$K_{2} C r_{2} O_{7} + 3 C a C l_{2} + 7 H_{2} S O_{4} \to C r_{2} (S O_{4})_{3} + K_{2} (S O_{4}) + 3 C a (S O_{4}) + 3 C l_{2} + 7 H_{2} O$ .

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