What weight of nitrate ion (calculated as HNO3) is needed to convert 5 g of iodine into iodic acid according to the reactionI2+HNO3⟶HIO3+NO2+H2O
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a
12.4 g
b
24.8 g
c
0.248 g
d
49.6 g
answer is A.
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Detailed Solution
From the given reaction, the balanced equation is -I2+10NO3−+8H+→2IO3−+10NO2+4H2OFrom the above reaction,254g of I2 requires 620g of NO3−ion ∴5g of I2 requires 620 of NO3−ion =620×5g254=12.205g of NO3−