I am a 9th grader working on a science fair project to determine which salt, NaCL or MgCL produces the most hydrogen gas through electrolysis. I used 1.5 ml of water for each, and 17.5 mg of each salt respectively. After 1 hour of applying a 2.5 amp current through each sample, the NaCL solution formed a brownish residue, while the magnesium chloride solution had turned milky white. What reactions had taked place, and what were the product(s)? P.S. The wires in the water were copper.