Web14. jún 2024 · At first there is a solution of HCl with phenolphthalein already in it. Then I titrate NaOH solution into it. When all HCl has reacted with NaOH the solution... Web30. mar 2024 · Phenolphthalein is a presumptive test that reacts with the heme molecule present in blood. A positive reaction gives a pink color. While bloodstains normally appear red-brown in color, the color of the substrate or the age of a stain may affect the appearance or visibility of the stain. What pH does phenolphthalein pink? 8.2
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WebDrug reactions . NSAIDs, metronidazole, paracetamol, sulfonamides, tetracycline, phenytoin, oral contraceptives, barbiturate, phenolphthalein. No definitive features Exposure to medication. Stevens-Johnson syndrome/ toxic epidermal necrolysis ... Consider blood tests: Serology for HSV-1 and 2, EBV (plus monospot), CMV, Syphilis and Mycoplasma ... Web14. jan 2024 · Blood detection The most publicized test by crime shows is the Luminol process in which a chemical is sprayed onto a surface where blood is suspected to be. The chemical reacts with traces of blood, producing a chemi-luminescence, or apparent glow, as a result of the chemical reaction that occurs. What happens to phenolphthalein in neutral? commercial bank and trust of latrobe
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Webgel formed, phenolphthalein that was present in the aqueous solution became physically trapped in the transparent cross-linked network. The hydrogel remained on paper even after the surface was washed to remove unreacted amplification solution. When 2 μL of 0.5 M NaOH was added to the surface, the pH increased above 8 and phenolphthalein Web5. mar 2024 · marks. There was some confusion with the colours of phenolphthalein. Surprisingly, despite the name of the indicator, a significant minority managed not to suggest orange as one of the colours with the acceptable colours of red and pink often being given as the colour at the end point. Some gained one mark for the colours in the … Web21. máj 2024 · Luminol can be used to identify minor, unnoticed, or hidden bloodstains, and it also has a high sensitivity to old blood or completely dried blood but, unfortunately, luminol can react with detergents, metals, and vegetables to give … dry washing