Help with test for anion in Copper Chloride

[chound]

I was given a small amount of Copper Chloride. When I brought my spatula(dirty ofcourse) the salt turned slightly green. Also when preparing the Sodium extract, I added 1 part CuCl₂ and 3 parts NaCO₃ and 3/4ths water. I stirred it slightly with the spatula, it turned black and my extract got prepared much before the others.

I want to know what was in the spatula that made the extract production quicker coz. during my exams I could probably use it and finish it quickly.

Also the china dish which had my extract became dirty so the teacher asked me to use dil. HCL to clean it. I put a little bit and like magic the dirt went away. I was so amazed. What is the equation of the reaction that happened?
Why doesn't anyone use HCL for cleaning the kitchen utensils?

 

[GCT]

I would imagine that the HCl protonated the compound so that it was extracted into the water.

You might want to be a bit more clearer with the first paragraph.

 

[Nerro]

perhaps you ever so slightly hydrated the cupricchloride with the dirty spatula which would be why it turned green. When you added the NaCO_3 to the CuCl_2 you made CuCO_3 Which is black. When you then added the hydrochloric acid you converted the CuCO_3 back to CuCl_2 which is pretty soluble.

People do not use hydrochloric acid to clean their glassware because it does not really clean a lot of things very well. Only oxides and carbonates will really react with it. For organic residues you would need something much stronger, like a strong oxidizer such as H_2SO_5 or Mn_2O_7 which are usually created in situ by mixing sulfuric acid with hydrogenperoxide or potassiumpermanganate.