The following process has been used to obtain iodine from $$oil-field$$ brines in California.NaI $$+$$ $$AgNO3$$ → AgI $$+$$ $$NaNO3$$ ....$$.12AgI$$ $$+$$ Fe → $$FeI2$$ $$+$$ $$2Ag$$ .....$$.22FeI2$$ $$+$$ $$3Cl2$$ → $$2FeCl3$$ $$+$$ $$2I2$$ ......$$.3How$$ many grams of $$AgNO3$$ are required in the first step for every $$254$$ kg $$I2$$ produced in the third step ?

Question

The following process has been used to obtain iodine from $$oil-field$$ brines in California.NaI  $$+$$  $$AgNO3$$  →   AgI  $$+$$  $$NaNO3$$       ....$$.12AgI$$  $$+$$  Fe  →   $$FeI2$$  $$+$$  $$2Ag$$                  .....$$.22FeI2$$  $$+$$  $$3Cl2$$  →   $$2FeCl3$$  $$+$$  $$2I2$$          ......$$.3How$$ many grams of $$AgNO3$$ are required in the first step for every $$254$$ kg $$I2$$ produced in the third step ?

Infinity Learn · Accepted Answer

Balanced equation : Balance the given series of equations to get $$2$$ moles of  IodineNaI  $$+$$  $$AgNO3$$  →   AgI  $$+$$  $$NaNO3$$       ....$$.1$$×$$4$$⇒$$4NaI+4AgNO3$$→$$4AgI+4NaNO32AgI$$  $$+$$  Fe  →   $$FeI2$$  $$+$$  $$2Ag$$                  .....$$.2$$×$$2$$⇒$$4AgI$$  $$+$$ $$2Fe$$ →   $$2FeI2$$  $$+$$  $$4Ag2FeI2$$  $$+$$  $$3Cl2$$  →   $$2FeCl3$$  $$+$$  $$2I2$$          ......$$.3Hence$$  $$4$$ moles of $$AgNO3$$→$$2$$ moles of $$I2$$            $$4$$×$$170g$$ of $$AgNO3$$ → $$2$$×$$254g$$                          ?             →  $$254$$×$$103gmass$$ of $$AgNO3$$ required $$=$$ $$254$$×$$1032$$×$$254$$×$$4$$×$$170$$ $$=$$ $$340$$×$$103g$$

The following process has been used to obtain iodine from oil-field brines in California.NaI + AgNO3 → AgI + NaNO3 .....12AgI + Fe → FeI2 + 2Ag ......22FeI2 + 3Cl2 → 2FeCl3 + 2I2 .......3How many grams of AgNO3 are required in the first step for every 254 kg I2 produced in the third step ?

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