أرشيف الوسم : indicator

A substance that reveals, through characteristic color changes, the degree of acidity or basicity of solutions. Indicators are weak organic acids or bases which exist in more than one structural form (tautomers) of which at least one form is colored. Intense color is desirable so that very little indicator is needed; the indicator itself will thus not affect the acidity …

ملخص الفصل الرابع :أنواع التفاعلات الكيميائية و العلاقات الكمية للمحاليل من كتاب الكيمياء للعالم زومدال Chapter 4 notes: Types of Chemical Reactions and Solution Stoichiometry , Chemistry Zumdahl إذا كنت تبحث عن باقي الفصول فالرجاء الضغط على الروابط الآتية : الفصل الأول : ملخص الفصل الأول :أساسيات الكيمياء للعالم زومدال Chapter 1 chemistry foundation Notes Zumdahl AP الفصل الثاني  :ملخص الفصل …

adsorption indicator (absorption indicator) A type of indicator used in reactions that involve precipita­tion. The yellow dye fluorescein is a common example, used for the reac­tion NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq) As silver nitrate solution is added to the sodium chloride, silver chlo­ride precipitates. As long as Cl” ions are in excess, they adsorb on the precipitate particles. …