K2TeO3 + 2K[Sn(OH)3] + 3H2O → Te + 2K2[Sn(OH)6]
Potassium tellurite react with potassium trihydroxostannate(II) and water to produce tellurium and potassium hexahydroxostannate(IV). The reaction takes place in a concentrated solution potassium hydroxide.