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How many moles HCL will be required to react with potassium ...

How many moles HCL will be required to react with potassium heptaoxodichromate (VI) to produce 3 moles of chlorine?

A.

14

B.

12

C.

11

D.

10

View answer & explanation

Correct answer is A

K $_{2}$ Cr $_{2}$ O $_{7}$ + HCl → Cl $_{2}$ + KCl + CrCl $_{3}$ + H $_{2}$ O

Balancing the equation, we have

K $_{2}$ Cr $_{2}$ O $_{7}$ + 14HCl → 3Cl $_{2}$ + 2KCl + 2CrCl $_{3}$ + 7H $_{2}$ O

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