مصادر الكيمياء موقع لتعليم الكيمياء بصورة مبسطة
borax-bead test A preliminary test in qualitative inorganic analysis that can be a guide to the presence of certain metals. A small loop is made in the end of a platinum or Nichrome wire and heated in a Bunsen flame until red hot. It is then dipped into powdered borax, …
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