1. Using known solutions containing Cu 2+ , you will construct a graph of: a) Wa

Question

1. Using known solutions containing Cu2+, you will construct a graph of:

a) Wavelength vs. concentration

b) Moles vs. wavelength

c) Moles vs. transmittance

d) Absorbance vs. concentration

e) Absorbance vs. transmittance

2. Which of the following will be held constant (or assumed constant) in the colorimetric measurements of the standard solutions of different concentration?

a) Solution sample width

b) Wavelength

c) Identity of absorbing species

d) All of these

3. The Beer-Lambert law tells us that concentration and absorbance are:

a) Proportionally related (as one increases, the other increases)

b) Inversely related (as one increases, the other decreases)

Explanation / Answer

1 ) the answer is d .we plot a graph of absorbance vs concentration

2)d all of these

3) a . the relation is A=elc

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