جميع المواضيع المتعلقة بـ ‘indicator’

 

Acid base indicators

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 of the solution.

Acid-base indicators are commonly employed…

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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

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

الكيمياء العامة 1 ، الكيمياء العامة 101 ، General Chemistry

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(adsorption indicator (absorption indicator

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. At the end point, no Cl…

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