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AlexFokin [52]
3 years ago
5

What is the first step in this experiment?

Chemistry
2 answers:
mr_godi [17]3 years ago
7 0

Answer: Cut the card borad

Explanation:

allsm [11]3 years ago
5 0
Cutting the cardboard would be the first step
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(b) Data has been collected to show that at a given wavelength in a 1 cm pathlength cell, Beer's Law for the absorbance of Co2+
OlgaM077 [116]

Answer : The concentration of a solution with an absorbance of 0.460 is, 0.177 M

Explanation :

Using Beer-Lambert's law :

A=\epsilon \times C\times l

where,

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l = path length

\epsilon = molar absorptivity coefficient

From this we conclude that absorbance of solution is directly proportional to the concentration of solution at constant path length.

Thus, the relation between absorbance and concentration of solution will be:

\frac{A_1}{A_2}=\frac{C_1}{C_2}

Given:

A_1 = 0.350

A_2 = 0.460

C_1 = 0.135 M

C_2 = ?

Now put all the given values in the above formula, we get:

\frac{0.350}{0.460}=\frac{0.135}{C_2}

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Therefore, the concentration of a solution with an absorbance of 0.460 is, 0.177 M

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