math check
2008-06-25 by DJ Delorie
someone check my math and assumptions, please... I have 3l of etchant (HCl/H2O2) on its way to a CuCl etchant. To get the specific gravity from 1.0 to 1.2, that means I need to add about 600g of copper? And that solution will etch another 600g of copper before it hits 1.4 ? (plus or minus adjustments for increased volume, added HCl, etc) (yes, it's at 1.0 now - I weighed 100ml of solution, it's 100g) Seems like a lot of copper.