[Portomar1970]

What color would result if you combine NaI with starch? Then what color would result if you combined that NaI and starch solution with bleach?

I did this lab in school but got nothing!? Not sure what I did wrong.

[Arkcon]

Then you should report what you saw.  If there are other questions to answer in this lab practical, you should give them a try.

I know its weird, to do something, and see nothing -- if you wanted to see nothing, you could have just stayed home.   So you're correct to suspect something is wrong.  But what else can you do?

[AWK]

Check reaction of KI with bleach (important - small amount) without starch. Solution should be brown (if not - check identity of solutions). Then add starch.

[Portomar1970]

Thank you so much! Do you mean add bleach?

[AWK]

An excess of KI is needed in relation to bleach.