Question

LUIGIO ASSICUL Name CHEM 1090-General Chemistry Section Preparing Dilute Solutions C. V, - CV C is the concentration of the original concentrated solution V1 is the volume of the original concentrated solution C is the concentration of the final dilute solution V2 is the volume of the final dilute solution Solution unit is mol/l which can also be written as M A solution that is 0.1 MNaonds A common solution unit is mol/l 0.1 moles NaOH for every liter of solution Beer's Law Calibration Curve A colored colored solution absorbs visible light with wavelengths that vary between approximately 400 nm and 700 nm. A spectrophotometer or colorime him. A spectrophotometer or colorimeter can create light tuned to a specific wavelength, pass this right through a sample of the colored solution and determine the amount of light that is absorbed/transmitted. For example, an aqueous solution of the complex ion Cu(NH) 2 is a deep blue color and exhibits a maximum light absorption around 620 nm. The colorimeter actually measures percent transmittance of light but this can be converted to absorbance. Absorbance plotted as a function of the complexion concentration is known as a Beer's law plot (absorbance has no units): Absorbance as a Function of Concentration for Cu(NH3)42+ at 620 nm 0.500 0.400 0.300 Absorbance 0.200 0.100 0.0000 0.0200 0.0400 0.0600 0.0800 Concentration of Cu(NH3)42+ (M) 0.1000 Revised 08/22/2019 1 of 2

Answer 1

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$\Rightarrow$Answers:

1. part - (a): Concentration = 0.9375 M ( mol/L )
2. part - (b): Concentration = 0.0625 M ( mol/L )
3. part - (c): Concentration = 0.03125 M ( mol/L )

$\Rightarrow$Explanation:

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