1. 7.5/7.5 points Last Response | View Saved Work | Show Details All Responses Notes The following items deal with safety issues in the Solutions and Spectroscopy experiment. Check all the boxes that contain correct answers to each question. a. Copper(II) sulfate involves the following hazards: [_] It's highly corrosive. [x] It's toxic. [_] It's a carcinogen. [_] It's flammable. [x] It's an irritant.b. If you spill copper(II) sulfate solution on yourself, you should [_] neutralize it with a solution of sodium bicarbonate. [_] dry the area with paper towels but avoid getting it wet. [x] flush the affected area with water. [_] neutralize it with a solution of sodium bisulfite.c. Proper clothing for laboratory includes: [x] Shoes that cover heels and toes [_] Shorts [x] A shirt that covers the shoulders (has sleeves) [x] Pants that extend to the ankles [x] Shirt and pants should overlap 6" [_] Sandals [_] Tank tops without sleeves2. 2.5/2.5 points Last Response | View Saved Work | Show Details All Responses Notes This question deals with waste disposal in the Solutions and Spectroscopy experiment. Check all the boxes that correctly complete the following statement. Waste solutions containing copper ion are to be [_] flushed down the sink. [_] no waste will be generated in this experiment. [x] dumped in a beaker labeled "waste copper" on one's bench during the experiment. [x] disposed of in the bottle for waste copper ion when work is completed.[_] returned to the bottle containing 0.5 M copper sulfate solution. 3. 5/5 points Last Response | View Saved Work | Show Details All Responses Notes The following questions deal with making solutions and using volumetric glassware. You should review the information on Volumetric Glassware in the Introductory Material of your lab manual and the videos under "Solutions" on the HM NCSU Chemistry Video Library at http://www.ncsu.hmpublishing.biz/. a. The standard ways to make a solution of known concentration are [_] dissolving a weighed amount (known mass) of stock solution into a known volume of liquid. [x] dissolving a weighed amount (known mass) of solid into a known volume of liquid. [x] diluting a known volume of stock solution into a known volume of liquid. [_] dissolving a known volume of solid into a known mass of liquid.b. Volumetric flasks are built to contain a known volume of liquid to an accuracy of about 0.1 % of the flask's capacity. c. Most pipets are built to deliver a known volume of liquid. d. Volumes obtained with volumetric flasks, pipets, and burets are recorded to the nearest 0.01 mL.4. 3/3 points Last Response | View Saved Work | Show Details All Responses Notes The following questions deal with copper(II) sulfate. a. In part B of this experiment, you will use copper(II) sulfate pentahydrate. What is the molar mass of this compound? 249.62 g/molb. How much of this compound must be weighed to make 275.0 mL of a 0.15 M solution? 10.297 gc. How many mL of the 0.15 M solution should be diluted to prepare 150.0 mL of a 0.05 M solution? 50 mL5. 5/7 points Last Response | View Saved Work | Show Details All Responses Notes The following items deal with spectroscopy and Beer's Law. a. Beer's Law is often written as:A = lCPut the letter of the correct definition in the block before each symbol. AlFCDCAA. pathlength of light through the cellB. concentration, in mol/L, of the stock solution from which the sample was madeC. absorbance measured by the spectrometerD. molar absorptivity, a constant unique to that substance at that wavelengthE. the wavelength of the light being used for the measurementF. concentration, in mol/L, of the sample solution being measuredb. 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+ is linear. If a 0.135 M solution of Co2+ has an absorbance of 0.350, what is the concentration of a solution with an absorbance of 0.430. .166 Mc. In this experiment, a calibration curve (often called a Beer's Law plot) will be made. Please read "Plotting a Calibration Curve" in the Introductory Material of your lab manual and review the following link on graphing in Excel (http://www.ncsu.edu/chemistry/resource/excel/excel.html) to answer the question below.A calibration curve should have which of the following attributes? [x] the command for getting an equation is "Add Trendline" in Microsoft Excel [_] absorbance is plotted on the x axis [_] the x and y axes should be labeled with units as well as quantities [_] concentration is plotted on the y axis [_] in a hand-plotted graph, individual lines should be drawn between adjacent points [_] absorbance is plotted on the y axis [x] concentration is plotted on the x