can make a copper sulfate(CuSO4).
DO THIS OUTSIDE DO NOT BREATH FUMES
from a nitrate fertilizer, NaNo3, or Kno3, (sodium or pottasium nitrate)1POUND
add copper a baby jar full,(if you have gold platted copper pins even better) to fertilizer in gallon glass jar.
a pyrex coffee pot 10 cups sulfuric acid (new 37% H2SO40) boil acid down to 6 cups to concentrate, let cool.
caution when adding sulfuric acid to fertilzer as nitric acid is formed, this will disolve the copper and other base metals, leaving gold shells undisolved.
get pot bigger than gallon glass jar add a 1inch layer of sand in bottom, sit gallon jar on this sand, then pour sand around outside of jar, this is so we can heat the jar safely so it wont break.
Note DO NOT CHANGE TEMPERATURE OF GLASS RAPIDLY (thermal shock).
now sit this sand bath pan on hotplate, bring up temperatue a little at a time.
this will boil off the nitric acid as a gas (NO2) (NO2 can be bubbled into water to collect the nitric acid (HNO3)), ( more on this latter) DO NOT BREATH BROWN GAS.
the solution will change colors, from green (copper nitrate) to blue (copper sulfate).
let cool, add water to keep copper salts from forming, or to dissolve them.
let sit till gold shells fall to bottom decant liquid.
if you want copper sulfate crystalls put this blue liquid in coffee pot and boil down to small volume let cool remove liquid from crystalls.
these crystals can be used for alot of things, gardening, fish ponds,
roots in sewer lines, electroplating ,ecetera.
now if you do want to collect the NO2 gas (brown red ), and bubble it through water to make Nitric acid, you need a teflon lid for gallon glass jar drill a hole in it for a ptfe plastic tubing use tape electical to seal lid run this tube into the bottom of another bottle with a small amount of water to bubble No2 gas through. this will make nitric acid when distilled.
when first boiling the almost pure nitric will distill off first, till soution in jar boiling reaches 68% nitric , then the gas will distill off 68%(azeotrope) till all NO2 gone from boiling jar.
formula:
NaNO3 + H2SO4 + Cu Au ----> CuSO4 (NaSO4)+ HNO3 + GOLD(Au)
(heat) ( NO2 + H2O)
good luck and be careful Richard.