Why did the lead nitrate form a yellow-orange like residue with the potassium chromite when combined?

Question

a lab partner formulated this question so now i'm stuck with it.i really need your help. thanks in advance! :)

Answer 1

Hello,

The most obvious answer is that it formed lead chromite salt which I would expect to be very insoluble and could well be expected to be colored.

However,  potassium chromite is not a particularly common chemical.   I am wondering if you meant potassium chromate or potassium dichromate?   That is an orange solid which forms an orange solution.   In that case,  it could form lead chromate which I would expect to be colored.   Also,  dichromate ion is a powerful oxidizing agent,  particularly in acidic solution and if the lead is in a lower oxidation state would likely form a complex solid mixture of various oxidation states of lead and chromium combined with oxygen with the exact composition depending on the precise concentrations of reactants and the reaction conditions.