electrolysis

negative terminal attracts h2 because h had a slight positive charge in h2o

2020\May
used laundry detergent bottle, I thought I rinsed it well but apparently not because accidentally made copper II chloride hydrous (copper is from wire used for terminals)

Little dark brown or black specks collected in the positive terminal oxygen bottle, also brown goop mixed in with the aqua colored copper chloride in the main water tank detergent jug.


Small and some large bubbles rose to the top of the negative terminal bottle I think the small bubbles at least are hydrogen
so I think I have about two tablespoons worth of hydrogen mixed with two tablespoons of air in that hydrogen bottle

I left the whole device outside and turned on for a day and a half

on the first day there was blue goo in the main water jug, now only blackish grayish water brownish possibly, looks like some twigs fell in or were put in. 
I found no visible traces remaining of copper chloride.
Correction, a tiny bit of copper chloride inside the cap to the detergent-jug/main-water-tank.

The copper positive electrode is completely gone, I think it dissolved.

negative copper electrode had thin white coating near the top and is black at the bottom, regular copper in the middle, as far as I know the whole length of it was submerged

One of the electrode gas collector cups has some brown on it's inside wall, I'm gonna assume it was the positive one