Reminded students to write up lab as they go and not leave it all for the end.
By today, they should have written up the Cover Sheet, General Statement, Day 1 Material List, Procedure, Diagram, and Safety Procedures.
Talked about Day 2 of Lab.
Drew diagram of apparatus and explained procedure and safety precautions.
You stop when you have 1-1.5 cm left in original test tube.
When done, compare the two liquids and then mix them back together to see if you get back the original.
Safety:
1. Put 3-5 boiling chips in test tube before you start heating to regulate the boiling and prevent burps
2. Closely monitor to prevent overboiling. You can move the wire gauze to increase or decrease the heat.
3. Make sure the rubber tubing in the collection test tube is above the level of the collected liquid (so liquid is not sucked back up if the heat decreases) but below the level of the water in the Erlenmeyer Flask (to allow for condensation)
4. Do not fill the Erlenmeyer Flask up so high that you spill water into the collection test tube.
For homework, students are to work on Day 2 material list, procedures, diagram, and safety.
Also went over flow chart and explained how to construct it.
Students started another run of Day 1 at about 2 pm and finished by 2:30 pm.
Thursday, February 26, 2009
Wednesday, Feb 25, 2009 - 4A
Collected preliminary work from anyone who had completed it.
Based on their preferences, I chose lab partners.
Students did Day 1 of Distillation of Wood Lab.
Based on their preferences, I chose lab partners.
Students did Day 1 of Distillation of Wood Lab.
Tuesday, Feb 24, 2009 - 4B
Handed out green-sheet showing what was expected in lab write-up.
Students did Day 1 of Distillation of Wood Lab. I let students choose their own lab partners.
Students did Day 1 of Distillation of Wood Lab. I let students choose their own lab partners.
Monday, Feb 23, 2009 - 4A
Went over Distillation of Wood Lab - Day 1
Sketched diagram of apparatus on board, explained procedures and safety precautions.
Safety: Put 7 popsicle sticks in the burning test tube. You want to fill it but not over-cram it.
2. Attach test tube clamp just at the rubber stopper to prevent melting the rubber stopper. Do not move the alcohol lamp beyond this clamp.
3. The glass L coming from the burning test tube needs to be below the level of ice water in the Erlenmeyer flask so the gas has a chance to condense.
4. Hold the mason jar upright so it doesn't tip over when filling with gas.
5. Make sure you remove the rubber tubing from the water before shutting off the lamp.
Handed out green-sheet showing what was expected in the lab write-up.
Students practices lighting and extinguishing the alcohol lamps.
Students drew pictures of lab equipment.
Students filled out slips of paper with their top 3 choices for lab partners.
Sketched diagram of apparatus on board, explained procedures and safety precautions.
Safety: Put 7 popsicle sticks in the burning test tube. You want to fill it but not over-cram it.
2. Attach test tube clamp just at the rubber stopper to prevent melting the rubber stopper. Do not move the alcohol lamp beyond this clamp.
3. The glass L coming from the burning test tube needs to be below the level of ice water in the Erlenmeyer flask so the gas has a chance to condense.
4. Hold the mason jar upright so it doesn't tip over when filling with gas.
5. Make sure you remove the rubber tubing from the water before shutting off the lamp.
Handed out green-sheet showing what was expected in the lab write-up.
Students practices lighting and extinguishing the alcohol lamps.
Students drew pictures of lab equipment.
Students filled out slips of paper with their top 3 choices for lab partners.
Friday, Feb 20, 2009 - 4B
Went over Distillation of Wood Lab - Day 1
Sketched diagram of apparatus on board, explained procedures and safety precautions.
Safety: Put 7 popsicle sticks in the burning test tube. You want to fill it but not over-cram it.
2. Attach test tube clamp just at the rubber stopper to prevent melting the rubber stopper. Do not move the alcohol lamp beyond this clamp.
3. The glass L coming from the burning test tube needs to be below the level of ice water in the Erlenmeyer flask so the gas has a chance to condense.
4. Hold the mason jar upright so it doesn't tip over when filling with gas.
5. Make sure you remove the rubber tubing from the water before shutting off the lamp.
Started going over how to do the write-up.
Students practices lighting and extinguishing the alcohol lamps.
Students did a trial set-up of the Day 1 apparatus.
Sketched diagram of apparatus on board, explained procedures and safety precautions.
Safety: Put 7 popsicle sticks in the burning test tube. You want to fill it but not over-cram it.
2. Attach test tube clamp just at the rubber stopper to prevent melting the rubber stopper. Do not move the alcohol lamp beyond this clamp.
3. The glass L coming from the burning test tube needs to be below the level of ice water in the Erlenmeyer flask so the gas has a chance to condense.
4. Hold the mason jar upright so it doesn't tip over when filling with gas.
5. Make sure you remove the rubber tubing from the water before shutting off the lamp.
Started going over how to do the write-up.
Students practices lighting and extinguishing the alcohol lamps.
Students did a trial set-up of the Day 1 apparatus.
Thursday, Feb 19, 2009 - 4A
Handed back waves test. Went over any questions and then collected tests.
Finished reviewing safety contract.
Introduced and identified lab equipment explaining several safety precautions.
Students took safety quiz
Collected signed safety contracts, students who did not hand them in need to hand them in next time.
Finished reviewing safety contract.
Introduced and identified lab equipment explaining several safety precautions.
Students took safety quiz
Collected signed safety contracts, students who did not hand them in need to hand them in next time.
Wednesday, February 18, 2009
Wednesday, Feb 18, 2009 - Block 4B
Handed back waves test. Went over any questions and then collected tests.
Finished reviewing safety contract.
Introduced and identified lab equipment explaining several safety precautions.
Students took safety quiz
Students drew pictures of lab equipment.
Collected signed safety contracts, students who did not hand them in need to hand them in next time.
Equipment quiz next time.
Finished reviewing safety contract.
Introduced and identified lab equipment explaining several safety precautions.
Students took safety quiz
Students drew pictures of lab equipment.
Collected signed safety contracts, students who did not hand them in need to hand them in next time.
Equipment quiz next time.
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