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Question

254 g of I2 and 142 g of Cl2 are made to react completely to yield a mixture of ICl and ICl3. The moles of ICl3 formed are :

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Solution

The balanced chemical equation for the reaction is,

I2+2Cl2ICl+ICl3
Thus, 1 mole of iodine reacts with 2 moles of chlorine to form 1 mole of iodine trichloride.
The molar masses of iodine and chlorine are 254g/mol and 71g/mol respectively.

254 g of iodine corresponds to 1 mole and 142 g of chlorine corresponds to 2 moles. 1 mole of iodine requires 2 moles of chlorine. Hence iodine and chlorine are present in stoichiometric amount. Thus, 1 mole of iodine trichloride is formed.

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