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Nitella [24]
2 years ago
8

Petra finds a discolored stain on the carpet at a suspected crime scene. What two presumptive tests might she use to determine i

f the stain is blood? First, Petra sprays the discolored area with , which returns a glowing blue color. However, she knows that this chemical might also turn blue with other substances that contain iron. Subsequently, she uses , which turns pink, indicating the presence of hemoglobin.
Biology
2 answers:
dmitriy555 [2]2 years ago
5 0

Answer:

a. luminol b. phenolphthalein

Explanation:

looked it up, luminol turns green and the other one turns pink

german2 years ago
3 0

Answer:

First, Petra sprays the discolored area with  

Fluorescein

, which returns a glowing blue color. However, she knows that this chemical might also turn blue with other substances that contain iron. Subsequently, she uses  

Phenolphthalein

, which turns pink, indicating the presence of hemoglobin.

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