1. 6.75/6.75 points Last Response | Show Details All Responses Notes These items concern safety issues in the Buffers lab. Choose all correct responses for each question. a. Which hazards are associated with chemicals used in these experiments? [_] All are flammable. [_] Some are flammable. [x] Some are corrosive. [_] All are explosive. [_] Some are explosive. [_] All are corrosive.b. Which chemicals are listed as hazardous? [_] Na3PO4·12H2O [x] HC2H3O2 [_] NaH2PO4·H2O [_] Na2HPO4·7H2O [x] HCl [x] NaOH [_] NaC2H3O2·3H2Oc. What actions should you take if you splash one of these chemicals into your eyes? [_] Go to your instructor immediately for assistance. [x] Hold your eyes open while flushing them with water. [_] Have your lab partner find the correct solution to neutralize the chemical. [x] Use the eyewash immediately. [x] Have your lab partner notify your instructor about the accident.2. 2.25/2.25 points Last Response | Show Details All Responses Notes What should be done with the wastes generated in this experiment? [x] They can all be flushed down the sink with water. [_] The HCl and NaOH should be poured into the container on the sideshelf, but all the others can be flushed down the sink with water.[_] They should be kept in a labeled beaker at the desk and poured into the container on the sideshelf at the end of the experiment. [_] No waste will be generated in this experiment.3. 6/6 points Last Response | Show Details All Responses Notes In Part A of the experiment, you will need to generate some 0.60 M acetic acid solution by dilution of a stock solution. a. what is the concentration of the stock solution: 6 M b. How many mL of the dilute solution should you prepare? 100 mL c. How many mL of the stock solution will you need? 10.0 mL To save yourself some time in the lab, put this information in your lab notebook now.4. 4/4 points Last Response | Show Details All Responses Notes In Part A of the experiment, you will need to generate some 0.60 M sodium acetate solution by dissolving the solid. The form of sodium acetate you will use is the trihydrate, NaC2H3O2·3H2O. a. How many mL of the sodium acetate solution should you prepare? 100 mL b. How many grams of the solid will you need to use? 8.165 g Report your answer to at least three significant figures.To save time in the lab, put this information in your lab notebook now.5. 4/6 points Last Response | Show Details All Responses Notes Consider 50 mL of a solution that is 0.25 M in both H2PO41- and HPO42-. a. What is the pH of this solution? (No Response) Report your pH to two places past the decimal point.b. What would be the effect of adding 5 mL of 1.0 M HCl? (_) The pH would increase dramatically. (_) The pH would decrease dramatically. (_) The pH would not change at all. (_) The pH would increase slightly. (o) The pH would decrease slightly. c. What would be the effect of adding 2 mL of saturated NaOH (50 mass %, density 1.5 g/mL)?(_) The pH would decrease dramatically. (_) The pH would not change at all. (_) The pH would increase slightly. (_) The pH would decrease slightly. (o) The pH would increase
View Full Document
Unlocking...