[GHS Biology: Scientific Method Quiz #1]
Blue Indophenol dye is used to test substances for the presence of Vitamin C. It turns from blue to clear when a substance contains Vitamin C.

 

Question: Which juice contains the most Vitamin C?

7. Is the 0.100% Vitamin C solution considered the

a) Experimental Variable

b) Positive Controlled Variable

c) Negative Controlled Variable

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