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Ahquasia Ramsay CHM3120C Post lab one Purpose: The purpose of this lab is to understand the importance of measurement using volumetric glassware calibration and analytical balance due to finding crucial, precise results in lab. For weighing procedures, the analytical balance will be perform in this lab and for volumetric analysis- a method form of quantitative analysis that consist of any amount of a substance is confirmed ( Encyclopedia Britannica, 2019) by measuring the volumes; calibration of a volumetric pipet and calibration of a burette will be performed in this lab as well. All of these different types of measurement are forms of quantitative analysis. According to Dao, qualitative analysis is one of the classical aspect of analytical chemistry. It is the analysis of solid, gas or liquid blend to recognize the exact percentage of the sample in terms of compounds, radicals or elements and the main question being ask is “how much is there?”(Dao, 2019). Materials: Composition notebook Lab coat goggles Pen calculator Weighing paper Small beaker Flask Analytical balance Kim wipe Any coin Tweezer 25 mL volumetric pipet 100ml weighing glass bottle Deionized water 250 mL beaker Thermometer
Pipet bulb 100 mL volumetric flask Burette/ burette stand Safety: Water- Hazards Identification SDS section 3: None Handling SDS section 7: before leaving work, drinking, and eating, wash exposed areas and hands with mild soap. Personal protection SDS section 8: wear safety googles and gloves. Procedures: Analytical balance: 1.Obtain an analytical balance, making sure it is at zero and obtain a weighing paper and gently place it on the balance. 2.Precisely weigh the paper to the nearest .0001 grams and record the weight in composition book. 3.Place the coin on the weighing paper and weigh the amount to the nearest .0001 grams. Log the weight in notebook. 4.Using a calculator, calculate the difference between the two different weights to determine the coin mass. 5.Repeat steps 2-4 two more times and calculate the standard deviation and the average mass of the coin.