Glassware

Objective:

Throughout the experiment, the goal was to compare the results of the glassware to each other to determine which one gave back the most accurate data. This was done through several trials to get an average in order to find the percent error, which was used to determine the accuracy of the glassware. By doing so, one should have practiced proper use of the glassware such as calibration, and then identifying the appropriate significant figures for the obtained value.

Materials/Equipment:

The following were used to perform these experiments:

- Part A: 50 mL graduated cylinder, 50 mL pipet and bulb, 100 mL volumetric flask, 250 mL beaker, top loading balance, disposable pipet

- Part B: 100 mL graduated cylinder, 50 mL pipet and bulb, 100 mL and 250 mL beakers, analytical balance, thermometer

- Part C: 5 mL pipet and bulb, 250 mL beaker, 100 mL volumetric flask(2)

Chemical: Cu(SO4) · 5H2O(s)

Experimental Procedure:

In Part A, obtain a clean graduated cylinder and pour 50 mL of water in the graduated cylinder. Carefully use a disposable pipet to make this accurate as possible. Look at the bottom of the meniscus in order to indentify the correct location for measurement. Next, Measure the mass of a dry 250mL beaker and record the mass in grams. Carefully put the water from the graduated cylinder into the beaker. Measure the mass of the beaker, which now contains the water. Take note that the mass should have increased of about 50 grams (because density of water is about 1g/mL and there is 50mL in volume, the mass should be about 50g). Take another clean 250mL beaker and pour more than 50 mL of water into the beaker. Clean a pipet and dry it. Place the bulb on top of the pipet to where the red line is located. Then press on the bulb to draw up water. Measure 50 mL of water into the pipet (where indicated by the black line) from the beaker. Remove the bulb on top and quickly place the index finger on top (it may take a few tries as...