so i know how it cleans but what is the composition of the solution after? because after using the same solution for a while it turns a greenish blue color so i was also wondering is it copper chloride?
The solution at the end will contain copper(II) ions, ethanoate ions (from the vinegar), sodium ions (from the salt), and chloride ions (from the salt). Plus a lot of 'impurities' from the vinegar. The blue colour will be from the copper ions. Strictly from [Cu(H2O)6]2+ ions. If the chloride ion concentration is high enough then the solution will become greener (and possibly even yellow) because of increasing amounts of the [CuCl4]2- ion.
