ماشاءاللہ زبردست ڈاکٹر صاحب بہترین نالج اور خوبصورت رہنمائی کرنے کا بہت بہت شکریہ اللہ تعالیٰ آپ کو صحت و ایمان کی بہترین دولت سے مالامال فرمائے آمین ❤
Jajakallah Bhai,,,umda video hai,,, Dr sabeel Sahab assalam-o-alekum me aapke video hameshaa dekhta hu ya yu kahu ki me aapka student hu or aapse ilm hasil karne ki koshish me hu,,,me Naushad ali,, Mumbai India se hu,,,,agar ho sake to kabhi tafsili video sab tarah ke use hone wale chemical or unke action or reaction ke bare me bataye aapki bohot meharbani hogi,,,,or jesa ki aapne Kai video me kaha hai ki chemical bhatti pe garam karke kaam karne se time bhi kam lagta hai or acha bhi hota hai iski wajahat farmaye,,,,
Oui, dans le cuivre ( particulièrement issu d'une extraction chimique) il peut y avoir une petite quantité d'or et d'argent..., mais ce n'est pas rentable de l'extraire.
This method is called Quarting, it is when 1 measure of gold and 3 measures of copper or silver are alloyed, then etched with nitric acid. For purifying gold.
