Extraction Of Gold W

2019-5-20in this gold extraction case, use zinc powder 80 grams or 4 times of quantity of goldnd hope to have gold 20 gramshe first time, we use zinc powder 50 grams the second time, we use zinc powder 30 grams, potassium hydroxide 110 grams per a liter of waterhe first silt, we use potassium hydroxide 80 grams.

related posts