unit 6 leson 3 sub lab
Substitute lab for Unit 6 lesson 3: Stoichiometry: Counting by Measuring Mass
Purpose
Determine the mass of several samples of chemical elements and compounds and use the data to count atoms.
Procedure
Start Virtual ChemLab and select Counting by Measuring Mass from the list of assignments. The lab will open in the Calorimetry laboratory.
Part 1, Measuring Metal
1. Click on the Stockroom. Click on the Metals sample cabinet. Open the top drawer by clicking on it. When you open the drawer, a petri dish will show up on the counter. Place the sample of gold (Au) in the sample dish by double-clicking on it Zoom Out. Double-click on the petri dish to move it to the stockroom counter. Click the green arrow to Return to Lab.
2. Drag the petri dish to the spotlight near the balance. Click on the Balance area to zoom in. Drag the gold sample to the balance pan and record the mass in Table 1.
3. Click on the red disposal bucket to clear the lab after each sample. Repeat for lead (Pb), uranium (U), sodium (Na) and a metal of your choosing.
USE THE FOLLOWING DATA: YOU DO NOT NEED TO GO INTO THE VIRTUAL LAB!
Part 1
Gold (Au) 51.0616 grams
Lead (Pb) 33.1230 grams
Uraniun (U) 51.0581 grams
Sodium (Na) 2.8699 grams
Your choice - Nickel (Ni) 24.0461 grams
Part 2
NaCl 1.0483 grams
C12H22O11 1.0280 grams
NH4Cl 0.9963 grams
C6H5OH 1.0362 grams your choice Ca(OH)2 0.9765 grams
Part 2, Measuring Compounds
1. Click on the Stockroom. Double-click on sodium chloride (NaCl) on the Salts shelf. The right and left arrows allow you to see additional bottles.
2. Return to Lab. Move the sample bottle to the spotlight near the balance area. Click on the Balance to zoom in and open the bottle by clicking on the lid (Remove Lid). Drag a piece of weigh paper to the balance pan and Tare the balance.
3. Pick up the Scoop and scoop out some sample; as you drag your cursor and the scoop down the face of the bottle it picks up more. Select the largest sample possible and drag the
Purpose
Determine the mass of several samples of chemical elements and compounds and use the data to count atoms.
Procedure
Start Virtual ChemLab and select Counting by Measuring Mass from the list of assignments. The lab will open in the Calorimetry laboratory.
Part 1, Measuring Metal
1. Click on the Stockroom. Click on the Metals sample cabinet. Open the top drawer by clicking on it. When you open the drawer, a petri dish will show up on the counter. Place the sample of gold (Au) in the sample dish by double-clicking on it Zoom Out. Double-click on the petri dish to move it to the stockroom counter. Click the green arrow to Return to Lab.
2. Drag the petri dish to the spotlight near the balance. Click on the Balance area to zoom in. Drag the gold sample to the balance pan and record the mass in Table 1.
3. Click on the red disposal bucket to clear the lab after each sample. Repeat for lead (Pb), uranium (U), sodium (Na) and a metal of your choosing.
USE THE FOLLOWING DATA: YOU DO NOT NEED TO GO INTO THE VIRTUAL LAB!
Part 1
Gold (Au) 51.0616 grams
Lead (Pb) 33.1230 grams
Uraniun (U) 51.0581 grams
Sodium (Na) 2.8699 grams
Your choice - Nickel (Ni) 24.0461 grams
Part 2
NaCl 1.0483 grams
C12H22O11 1.0280 grams
NH4Cl 0.9963 grams
C6H5OH 1.0362 grams your choice Ca(OH)2 0.9765 grams
Part 2, Measuring Compounds
1. Click on the Stockroom. Double-click on sodium chloride (NaCl) on the Salts shelf. The right and left arrows allow you to see additional bottles.
2. Return to Lab. Move the sample bottle to the spotlight near the balance area. Click on the Balance to zoom in and open the bottle by clicking on the lid (Remove Lid). Drag a piece of weigh paper to the balance pan and Tare the balance.
3. Pick up the Scoop and scoop out some sample; as you drag your cursor and the scoop down the face of the bottle it picks up more. Select the largest sample possible and drag the