Reactions of Tellurium |
Reactions with water |
Tellurium does not react with water under normal conditions. |
Reactions with air |
Tellurium burns in air to form dioxide tellurium(IV) oxide |
Te(s) + 2O2(g)TeO2(s) |
Reactions with halogens |
Under carefully controlled conditions in a sealed tube, tellurium reacts with chlorine to form Te3Cl2.
|
Tellurium reacts with fluorine and burns to form tellurium(VI) fluoride.
|
Te8(s) + 24F2(g)8TeF6(l) |
Carefully done, tellurium reacts with fluorine mixed with nitrogen gas at 0°C to form tellurium(IV) fluoride. Tellurium also reacts under controlled conditions with the other halogens chlorine, bromine and iodine to form tetrahalides.
|
Te8(s) + 16F2(g)8TeF4(s) |
Te8(s) + 16Cl2(g)8TeCl4(s) |
Te8(s) + 16Br2(g)8TeBr4(s) |
Te8(s) + 16I2(g)8TeI4(s) |
Reactions with acids |
Tellurium does not react with dilute non-oxidizing acids. |
Reactions with bases |
Tellurium does not react with dilute bases under normal conditions. |
Reduction Potentials |
Balanced half-reaction |
E0 / V
|
Te4+ + 4e-Te(s) |
+0.568 |
Te4+ + 2H+ + 6e-H2Te(g) |
+0.132 |
TeO42- + 4H+ + 2e-TeO2(s) + 2H2O
|
+1.509 |
HTeO4- + 3H+ + 2e-TeO2(s) + 2H2O
|
+1.202 |
H2TeO4 + 2H+ + 2e-TeO2(s) + 2H2O
|
+1.020 |
TeO42- + 2H+ + 2e-TeO32- + H2O
|
+0.892 |
HTeO4- + H+ + 2e-TeO32- + H2O
|
+0.584 |
HTeO4- + 2H+ + 2e-HTeO3- + H2O
|
+0.813 |
H2TeO4 + H+ + 2e-HTeO3- + H2O
|
+0.631 |
H2TeO4 + 3H+ + 2e-HTeO2+ + 2H2O
|
+0.953 |
H2TeO4 + 6H+ + 2e-Te4+ + 4H2O
|
+0.920 |
Te(OH)6(s) + 2H+ + 2e-TeO2(s) + 4H2O
|
+1.02 |
TeO32- + 6H+ + 4e-Te(s) + 3H2O
|
+0.827 |
HTeO3- + 5H+ + 4e-Te(s) + 3H2O
|
+0.713 |
HTeO2+ + 3H+ + 4e-Te(s) + 2H2O
|
+0.551 |
TeO2+ + 5H+ + 6e-H2Te(g) + 2H2O
|
+0.121 |
Te(s) + 2H+ + 2e-H2Te(g) |
-0.739 |
Te(s) + 2e-Te2- |
-1.14 |