What is the rule for displacement reactions of the halogens?
the most reactive halogen displaces all of the other halogens from solutions of their salts, and is itself displaced by none of the others. the least reactive halogen displaces none of the others, and is itself displaced by all of the others.
What reactions do halogens undergo?
Halogens react to a small extent with water, forming acidic solutions with bleaching properties. They also undergo redox reactions with metal halides in solution, displacing less reactive halogens from their compounds.
Why fluorine is not used for displacement of other halogens in their aqueous solution?
Fluorine is very reactive and it displaces the oxygen from water and hence the displacement reactions of Cl, Br, I using fluorine are not generally carried out in aqueous solution.
Which halogens can be displaced by fluorine?
(e) None of the halogens can be displaced by fluorine.
Is chlorine more reactive than potassium?
so valence electrons are more tightly held in Li than K. Due to larger size of K the valence electrons are loosely held and easy to remove the electron from K. Hence K is more reactive. Due to smaller size of fluorine it can hold the incoming electron more tightly than Cl hence more reactive than Cl.
Does fluorine and potassium chloride react?
If we then reacted the potassium chloride with fluorine gas, we would get a similar result. Fluorine is a more reactive halogen than chlorine as it is further up in the group 7 column. This means that the fluorine would displace the chlorine in potassium chloride resulting in potassium fluoride and chlorine.
What Colour is chlorine in aqueous solution?
pale yellow-green
Analysis of results – Trial results
| Halogen | Colour of upper organic layer after shaking with hydrocarbon solvent |
|---|---|
| chlorine | aqueous: pale yellow-green to colourless cyclohexane: colourless to pale yellow-green |
| bromine | aqueous: yellow-orange to colourless cyclohexane: colourless to pale yellow-orange |
How can you prove that chlorine is more reactive than iodine?
Chlorine is more reactive than iodine as it is higher up in group 7. If we add chlorine water to potassium iodide solution, the chloride will react with the potassium to form potassium chloride and it displaces the iodine.
Is sodium or chlorine more reactive?
Chlorine is also quite reactive, but not nearly as much as sodium. The mechanisms are different, as chlorine is an oxidizing element and sodium is a reducing element. Again, the lower magnitude of -52.8 kJ/mol for sodium compared to -349 kJ/mol for chlorine indicates that sodium will be more reactive.