[kla]

I need to handle in my lab tomorrow, please help me. My question is What information was gained from test tubes A & B?
In tube A, combine 10 drops of Fe(NO3)3 with 10 drops of NaOH. Before addition of NaOH: clear yellow, immediately after addition of NaOH: formation of gas, turbid more orange, 5-10 minutes after addition of NaOH: clear orange.
In tube B, combine 10 drops of KSCN with 10 drops of NaOH. Before addition of NaOH: clear colorless, immediately after addition of NaOH: clear colorless, 5-10 minutes after addition of NaOH: clear colorless.
Thank you everyone for helping me.

[Astrokel]

You need to show some attempts. Can you write any equilibrium chemical equations down?

[kla]

Fe(NO3)3 + NaOH <----> Fe(OH)3 + NaNO3
Fe3+ + OH- <----> Fe(OH)3
KSCN + NaOH <----> KOH + NaSCN
SCN- + OH- <---->

[cliverlong]

I think the reaction of the Iron(III) hexaaqua ion with hydroxide is probably the most relevant

http://www.chemguide.co.uk/inorganic/transition/iron.html#top
http://www.chemguide.co.uk/inorganic/complexions/aquaoh.html#top
http://www.chemguide.co.uk/inorganic/complexions/acidity.html#top

Did you do an experiment where the KSCN was added to the Iron(III) solution. One of the links above gives a specific use for that combination


Clive