Absorbance measurements are made on two copper (II) sulfate solutions. One is 0.20 molar and the other is 0.40 molar. The measurements are made using identical path lengths. Which solution will absorb less light? Explain your answer. 0.20 M because its lower concentration results in more light being transmitted. 0.40 M because its higher concentration results in more light being transmitted. O 0.40 M because its higher concentration results in less light being transmitted. O 0.20 M because its lower concentration results in less light being transmitted.

Percent absorbance of a particular wavelength of light in the soultion is 40%. Pb2+ ions is at the concentration is 4ppm, calculate the molarity.  assume all the absorbance is due to Pb2+ ions. Density of water is 997kg/m^3 note a second point on the graph is (2,20) or (3,30)

Please don't provide handwritten solution ....

1a.  A solution of dissolved ozone in water gives a percent transmittance of 83.4% when measured at 258 nm using a path length of 5.00 cm. The molar absorptivity of ozone at 258 nm is 2950 L/mol.cm. Calculate the absorbance of this sample and the concentration of ozone in the sample.

Wavelength of visible light determines color. True False

Cathode Ray Discharge Tube Demonstration An Exploration (Because of the DANGER involved and the fragile nature of the device, this is a demonstration rather than a true Exploration) Background information: Until recently, almost all televisions used a device known as the cathode ray tube, or CRT, to display the images. In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass envelope or "tube." The "ray" is a stream of electrons that naturally pour off the heated cathode into the vacuum. The Cathode Ray Tube is powered by an extremely high voltage DC current system and is dangerous! Electrons are negative. The anode is positive, so the anode attracts the electrons pouring off the cathode. The electrons hit the phosphorus screen and generate green photons, which we can see. Safety: The cathode ray discharge tube is not a toy and should be handled with a lot of precaution. An…

3. If the perceived color of a solution is green, what is the approximate wavelength of light that is being absorbed? (Use the color wheel) 630-720 nm violet red deep blue orange light blue yellow yellow- green 490-530 nm green 530-545 nm 580-6 545-580 450-490 nm

1. Based on your understanding of color's relationship to wavelength, identify the approximate wavelength of light (nm) emitted by strontium when it was burned.  2.While boiling potatoes for dinner in salted water, the pot boils over and you notice that the flame on your gas burner turns to bright yellow-orange. How would you explain the appearance of a color in the previously blue flame? 3.What would you conclude about chloride based on your results in the flame tests? 4.Place the metal solutions you tested in order of increasing energy based on the colors observed in the flame test; i.e., A < B < C.

1. What factors are included in the Beer's law expression for determining how much light passes through a liquid solution? 2. How would your test results be affected if you left fingerprints on the sides of the cuvette in line with the light path of the spectrometer (or colorimeter)? 3. The chemical sunset yellow, also known as yellow #6, looks yellow. What color(s) must be absorbed by this chemical? RED YELLOW GREEN WHITE CYAN MAGENTA RGB System (Transmitted light) Additive color system colored light Rendered with Corel Draw 9 RGB pollete 40 M iscalled BLUE-VIOLET 4. Sunset yellow has an extinction coefficient of 20,000 M-1 cm-1 at a lambda max of 470 nm. What is the concentration of a solution that has an absorbance of 0.893?

Question 4