Conclusion of Midterm :: essays research papers

Error Analysis   Ã‚  Ã‚  Ã‚  Ã‚  In such a big lab, so many errors can occur and even one little one can ruin everything. One could have missed a procedure or done a procedure incorrectly. Another could have been using the incorrect amount of liquid or sludge. Someone could have lost a test-tube or labeled it wrong causing the results to be mixed. Using too much water in the solubility tests or not getting all measurements almost exactly accurate could be two sources of error. One big mistake could be creating a vacuum in the fractional Distillation part of the lab. One careless mistake could have been doing the calculations incorrectly. Conclusion   Ã‚  Ã‚  Ã‚  Ã‚  The sludge lab is a long and complicated lab. So much can go wrong so easily. So we had to be very careful when doing this lab. It was basically a recap of all our previous labs done this year. First we used the Fractional Distillation. Then we used the Solubility lab and the density labs. Only new part was identifying the metal, but that wasn't very hard. So it was good that we reviewed our lab reports. This way we knew what procedures to take and what mistakes not to make. So it seems like we did everything right because the results make sense.   Ã‚  Ã‚  Ã‚  Ã‚  To get and identify Fraction I, we had to do a lot. First we filtered the sludge. Then we took 25cm3 of the sludge and separated it into three parts. So we took the first fraction and experimented on it. We purified it and determined its boiling point, density and solubility. We also had to see if it had an odor and whether it was flammable or not. After doing all this we realized that this Fraction was Isopropanol Alcohol. We came to this conclusion by looking at our data for the solubility, density, odor, boiling point, and flammability.   Ã‚  Ã‚  Ã‚  Ã‚  To get and identify Fraction III, we had to continue from Fraction I. After getting the first fraction we had to change tubes and et 2 more fractions. We threw away the 2nd because it was just a leftover mix. We took the third fraction and experimented on it. We purified it and determined its boiling point, density and solubility. We also had to see if it had an odor and whether it was flammable or not. After doing all this we realized that this Fraction was Water. We came to this conclusion by looking at our data for the solubility, density, odor, boiling point, and flammability.   Ã‚  Ã‚  Ã‚  Ã‚  Determining the soluble solid was hard and a rigorous procedure.