Hot-Dipped Galvanized Nails

Hot-Dipped Galvanized Nails - Hot-Dipped Galvanized Nails...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Hot-Dipped Galvanized Nails Introduction. In this experiment, the amount of zinc-coating placed on a nail was determined to perform an in-depth cost analysis to investigate if a building supply manufacturing company’s current price was appropriate for the galvanizing process. Iron nails are galvanized to prevent the formation of rust. The amount of zinc in this coating was determined through the use of gasometric and gravimetric methods. The students performed both gravimetric and gasometric analyses which allowed them to practice gas collection with the use of a beaker, graduated cylinder, rubber tubing, an Erlenmeyer flask and a ringstand with clamps and introduced them to the application of the ideal gas law, PV=nRT. The effectiveness of these two methods was assessed by calculating the average and percent difference between the data collected for each of the three trials and each of the two methods. By comparing the data and the overall sources of error, the most accurate method of the two utilized in this experiment for measuring the zinc was concluded. Considering the cost of coating, and determining how it matches up with the current production price of $0.0100 per 100 nails, the students were then asked to consider if it will be in the CEO’s best interest to increase the price or maintain its current value for the new customer’s annual order of 5 billion galvanized nails. Experimental Procedure. Students gathered all materials that were to be used in this experiment: a 100mL graduated cylinder, a 600 mL beaker, a 125 mL Erlenmeyer flask, an analytical balance, stopper/tubing, 60 mL of 6M HCl, 3 galvanized nails, and a ringstand with clamps. Throughout the experiment, students were to be cautious of one major hazard. A burn hazard from the hydrochloric acid was probable if splashed or spilled. This strong acid was handled with extreme care and disposed of down the sink followed by a thorough rinse down the drain. The weight of the nail, the temperature (23n C) and the pressure (1030 mbar) were recorded. The temperature and the pressure were then converted to Kelvin and atmospheres, respectively. 23 +273 = 296 K 1030 mbar x 1 atm __ = 1.017 atm 1013.25 mbar One more step had to be taken, when calculating the pressure. At 23n C, the vapor pressure of water liquid is 0.0277 atm. This fraction of pressure was then subtracted from that which was recorded to obtain the correct pressure of the hydrogen gas. 1.017 – 0.0277 = 0.989 atm In order to begin the gasometric analysis, the ringstand, graduated cylinder, beaker, rubber tubing and Erlenmeyer flask had to be assembled. The graduated cylinder was immersed into a tub of water and then placed upside down into a beaker filled with water so as to keep the water level stable. The graduated cylinder was suspended in the beaker
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Hot-Dipped Galvanized Nails - Hot-Dipped Galvanized Nails...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online