How many moles of hydrogen ions are required to produce 8 moles of iodine?
A. 2.5
B. 10
C. 25.6
D. 80
C
The equation gives the ratio of 16 moles of hydrogen ions producing 5 moles of iodine. The desired amount of iodine is 8 moles. The quantity of iodine has been increased by a factor of (8/5). To keep the ratio 9 constant, the quantity of hydrogen ions must also be increased by a factor of (8/5). When 16 is multiplied by (8/5), choice C is the result.