You should start with the same hot, supersaturated solution ( this is generally made by boiling a saturated solution of CuSO 4 until the volume reduces, but there are ABSOLUTELY NO crystals in the solution ) and then place it in some insulation, and let it cool VERY SLOWLY . After several days, crystals should form, and they should be nice and big and well defined .-- contribs 11 : 38, 12 October 2008 ( UTC)
42.
I plan to make a Voltaic pile and electrochemical cells . 1 ) How many grams of salt should be added per kilogram of water to make a saturated solution ? 2 ) If zinc and copper are the electrodes used, would saturated saline solution or 4 % acetic acid ( vinegar ) produce higher voltage and higher current ? 3 ) Would a combination of vinegar and saline produce more voltage \ current than either separately ? 4 ) Would dilute sulfuric acid ( perhaps one part battery acid to 10 parts water, such as was used in the early 19th century ) ) produce more voltage / current with zinc and copper electrodes than vinegar and / or saline?
