Answer:
A) Molecular weight
B) Rate of diffusion
C) Agar plates
Time of diffusion
Explanation:
A) The independent variable is the molecular weight because it is the variable that the researcher changes at will to aid his research. It doesn't depend on other variables.
B) The dependent variable is "Rate of diffusion because it depends on the molecular weight of the compound.
C) A control variable is one that would be held constant throughout the research.
In this case, the agar plates and the time of 2 hours diffusion remain the same throughout.
The standard curve was done at the wavelength of 362 nm for uniformity. We can use this function to determine the concentration at any absorbance value. At A = 0.782, c is,
<span>A = (3.2 x 10^-1 M^-1)c
0.782 = </span><span>(3.2 x 10^-1 M^-1)c
c = 2.44 M
The concentration of the triiodide solution is 2.44 M.</span>
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