1.8 halogens practical observations

A set of flashcards covering key concepts related to halogens.

What are the physical states and colours of the halogens at room temperature?

Flourine- yellow gas

Chlorine- green gas

Bromine- red-brown liquid

Iodine- grey/black solid

What color does iodine appear when made into a vapor?

Violet/purple.

What are the colors of chlorine water and bromine water?

Chlorine water is green/yellow-green and bromine water is red-brown.

What colour is iodine in polar solvents?

Yellow/brown color.

What colour is iodine in non-polar solvents?

Violet/purple

What fumes are produced when solid halides react with concentrated sulfuric acid?

Steamy/misty fumes of HF (fluoride), HCl (chloride), HBr (bromide), HI (iodide).

What indicates the presence of hydrogen sulfide (H2S) during reactions?

A smell of rotten eggs.

What happens to iodine when it is heated?

It sublimes into violet/purple vapour.

What is observed when iodide reacts with concentrated sulfuric acid?

• steamy/misty fumes (HI)

• Violet/purple vapour (I2)

• Smell of rotton eggs (H2S)

• Yellow solid (S)

• Grey-black solid (I2)

What is observed when solid halides react with concentrated phosphoric acid?

Steamy/misty fumes of:

HF (flouride)

HCl (chloride)

HBr (bromide)

HI (iodide)