Compounds | Reactions | Production
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Reactions of Iodine |
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Iodine reacts with water to produce hypoiolite, OI-. The pH of the solution determines the position of the equilibrium. |
I2(l) + H2O(l)![]() |
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Iodine is not reactive towards with oxygen or nitrogen. However, iodine does react with ozone, O3 to form the unstable yellow I4O9. |
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Iodine reacts with fluorine at room temperature to form the iodine(V) pentafluoride. At 250°C the same reaction yields iodine(VII) heptafluoride. With careful control of the reaction conditions, (-45°C, suspension of CFCl3), it is posible to isolate the iodine(III) fluoride. |
I2(s) + 5F2(g)![]() |
I2(s) + 7F2(g)![]() |
I2(s) + 3F2(g)![]() |
Iodine reacts with bromine to form the very unstable interhalogen species iodine(I) bromide. |
I2(s) + Br2(l)![]() |
Iodine reacts with chlorine at -80°C with excess liquid chlorine to form iodine (III) chloride. |
I2(s) + 3Cl2(l)![]() |
Iodine reacts with chlorine in the presence of water to form iodic acid. |
I2(s) + 6H2O(l) + 5Cl2(g)![]() |
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Iodine reacts with hot concentrated nitric acid to form iodic acid. The iodic acid crystallizes out on cooling. |
3I2(s) + 10HNO3(aq)![]() |
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Iodine reacts with hot aqueous alkali to produce iodate, IO3-. Only one sixth of the total iodine is converted in this reaction. |
3I2(g) + 6OH-(aq)![]() |
Reduction Potentials | |
Balanced half-reaction | E0 / V |
I2(s) + 2e-![]() |
+0.535 |
I2(aq) + 2e-![]() |
+0.615 |
3I2 + 2e-![]() |
+0.789 |
I3- + 2e-![]() |
+0.536 |
H5IO6 + H+ + 2e-![]() |
+1.601 |
HIO52- + 3H+ + 2e-![]() |
+1.898 |
HIO52- + 8H+ + 6e-![]() |
+1.389 |
2HIO52- + 18H+ + 14e-![]() |
+1.384 |
3HIO52- + 27H+ + 22e-![]() |
+1.357 |
HIO52- + 9H+ + 8e-![]() |
+1.288 |
HIO4 + 2H+ + 2e-![]() |
+1.626 |
IO4- + 2H+ + 2e-![]() |
+1.653 |
HIO4 + 6H+ + 6e-![]() |
+1.290 |
IO4- + 7H+ + 6e-![]() |
+1.235 |
2HIO4 + 14H+ + 14e-![]() |
+1.300 |
3HIO4 + 21H+ + 22e-![]() |
+1.276 |
HIO4 + 7H+ + 8e-![]() |
+1.215 |
IO3- + 6H+ + 4e-![]() |
+1.155 |
IO3- + 4H+ + 4e-![]() |
+0.972 |
2IO3- + 12H+ + 10e-![]() |
+1.196 |
2IO3- + 12H+ + 10e-![]() |
+1.178 |
IO3- + 2Cl- + 6H+ + 4e-![]() |
+1.24 |
2HIO3 + 10H+ + 10e-![]() |
+1.169 |
3HIO3 + 15H+ + 16e-![]() |
+1.145 |
HIO3 + 5H+ + 6e-![]() |
+1.078 |
2HIO + 2H+ + 2e-![]() |
+1.354 |
2IO- + 4H+ + 2e-![]() |
+2.005 |
3HIO + 3H+ + 4e-![]() |
+1.213 |
3IO- + 6H+ + 4e-![]() |
+1.701 |
IO- + 2H+ + 2e-![]() |
+1.313 |
HIO + H+ + 2e-![]() |
+0.987 |
2ICl3(s) + 6e-![]() |
+1.28 |
2ICl(s) + 2e-![]() |
+1.22 |
2ICl + 2e-![]() |
+1.19 |
2ICl2- + 2e-![]() |
+1.056 |
2IBr(aq) + 2e-![]() |
+1.02 |