Analysis Of Galvanized Nails, Quality Control, And Green Chemistry
In this lab, we handled acidic chemicals that needed to be disposed of upon completion of the lab. We disposed of these chemicals according to safety policies and green chemistry policies. Green Chemistry is the practice of chemistry in an environmentally safe way to prevent pollution. We used green chemistry to minimize the amount of waste we were to be creating. We ended up creating waste from degalvanizing nails. There was a 6 molar solution of hydrochloric acid that stripped the zinc on the nails. Nails are dipped in zinc to prevent rusting. The amount of zinc placed on these nails has to comply with industry standards. A high standard of zinc coating on nails would be one ounce of coating per square foot. The low standard is 0.28 oz/ft^2. Which lead to the question what brand of nails complies with the ASTM A-153 galvanized standard of being coated in 1 oz of zinc per square foot the best? This question is centrally based on the highest industry standard. The question was tested with five nails per individual and as a class we tested 100 nails. To prevent the HCl from destroying the pipes or damaging university property we had to dilute the 6M solution of HCl with a 2M solution of NaOH. The NaOH was used to bring HCl’s pH to 8.6.
Experimental: 5 nails were measured in length, radius, and surface area. The units were millimeters. An initial mass and final mass were recorded for each…