MEL Chemistry | Ozone: the guardian of our planet @melchemistry7035 | Uploaded September 2020 | Updated October 2024, 19 hours ago.
We've put together some ozone layers for you. What to do next – see in this experiment.
Equipment: flask with ozone, rubber stopper, ozonizer, solutions of iron(II) sulfate and potassium thiocyanate, porcelain bowl, potassium iodide solution, filter paper.
A flask is filled with ozone using an ozonizer and closed with a stopper. When a strip of filter paper is moistened with a solution of potassium iodide and put in the flask of ozone, the paper turns brown. When the walls of another flask are coated with a solution of iron(II) sulfate and potassium thiocyanate, and the flask is filled with ozone using an ozonizer, the flask turns red.
Ozone is a colorless gas with oxidizing properties. It can be produced in a laboratory via an electric discharge, and it forms in the atmosphere after lightning strikes: its low concentration in the air creates the familiar fresh smell after a thunderstorm.
3 O2 → 2 O3
Ozone easily converts iodide ions into molecular iodine.
2KI + O3 + H2O → I2 + 2KOH + O2
And it converts iron(II) to iron(III), which forms a red compound Fe(SCN)3 with potassium thiocyanate:
3FeSO4 + 6KSCN + O3 + H2O → 2Fe(SCN)3 + 3K2SO4 + Fe(OH)2 + O2
Ozone is poisonous, but it can be used to purify water, and it helps make life on Earth possible: a layer of this gas in the stratosphere protects us from harmful solar radiation.
Safe experiments await you in the MEL Chemistry subscription!
Safety precautions: Attention! All experiments are performed by professionals. Do not attempt.
We've put together some ozone layers for you. What to do next – see in this experiment.
Equipment: flask with ozone, rubber stopper, ozonizer, solutions of iron(II) sulfate and potassium thiocyanate, porcelain bowl, potassium iodide solution, filter paper.
A flask is filled with ozone using an ozonizer and closed with a stopper. When a strip of filter paper is moistened with a solution of potassium iodide and put in the flask of ozone, the paper turns brown. When the walls of another flask are coated with a solution of iron(II) sulfate and potassium thiocyanate, and the flask is filled with ozone using an ozonizer, the flask turns red.
Ozone is a colorless gas with oxidizing properties. It can be produced in a laboratory via an electric discharge, and it forms in the atmosphere after lightning strikes: its low concentration in the air creates the familiar fresh smell after a thunderstorm.
3 O2 → 2 O3
Ozone easily converts iodide ions into molecular iodine.
2KI + O3 + H2O → I2 + 2KOH + O2
And it converts iron(II) to iron(III), which forms a red compound Fe(SCN)3 with potassium thiocyanate:
3FeSO4 + 6KSCN + O3 + H2O → 2Fe(SCN)3 + 3K2SO4 + Fe(OH)2 + O2
Ozone is poisonous, but it can be used to purify water, and it helps make life on Earth possible: a layer of this gas in the stratosphere protects us from harmful solar radiation.
Safe experiments await you in the MEL Chemistry subscription!
Safety precautions: Attention! All experiments are performed by professionals. Do not attempt.
