Students finished the tests on the liquids - density, odor, crystal, and flammability.
Stamped lab books, once for each test.
Students drew element symbols - the language of chemistry.
Do counting atom exercise - hand in at end of period.
Collected lab notebooks to check for notes and grade over long weekend.
Thursday, April 9, 2009
Tuesday, April 7, 2009
Wednesday, April 8, 2009 - Block 4B
Students will finish the tests on the liquids - density, odor, and flammability.
Review the lab and the results:
Is color diagnostic?
Smell or odor?
Density?
If you have an object with a density greater than that of the alcohol but less than that of water, what will happen when you place it in water or alcohol?
Flammability?
Students draw element symbols - the language of chemistry.
Do counting atom exercise - hand in at end of period.
Review the lab and the results:
Is color diagnostic?
Smell or odor?
Density?
If you have an object with a density greater than that of the alcohol but less than that of water, what will happen when you place it in water or alcohol?
Flammability?
Students draw element symbols - the language of chemistry.
Do counting atom exercise - hand in at end of period.
Tuesday, April 7, 2009 - Block 4A
Students wrote down content objectives in their notebooks.
1. Successfully perform a fractional distillation
2. Using a microscope, describe and sketch a diagnostic crystal shape
3. Determine the density of liquids
4. Use the flammability test to determine if liquids are flammable.
Told students to sketch a large, diagnostic picture of the new crystals. Since they do not have to write down the temperature every 30 seconds, one partner can monitor the distillation while the other checks out the crystals. If they have good crystals, they do not have to redo the crystal part of this lab.
Went over procedure to find the density of liquids. Drew pictures and wrote description for each step.
1. Find mass of 5 ml graduated cylinder using electronic balance
2. Using a pipette put 5 ml of liquid into the 5 ml graduated cylinder. (If you don't have 5 ml of liquid, use what you do have)
3. Measure the liquid volume at eye level at the bottom of the meniscus
This will give you the volume of the liquid you use in the density calculation.
4. Find mass of the graduated cylinder + liquid
5. Subtract the mass of the graduated cylinder+liquid - mass of empty graduated cylinder to find the mass of the liquid.
6. Calculate the density using density = mass of liquid/volume liquid. Units of density should be g/cm^3
This time I remembered to sketch the data table on the board so students could see how to organize their data.
Demonstrated how to do the flammability test. Note that this is different from the "flame test" which we will cover later.
Alcohol lamp is on the left, coffee can with 2-3 inches of water is on the right. Move hand from left to right and then drop strip into can of water. Make sure you remove the flammability strips from the water and throw them into the garbage before dumping the water into the sink.
Went over the graphs from Day 1 Fractional Distillation. Boiling points of liquid 1 ranged from 80-85 deg C. Told students to swap out test tubes at 85 deg C.
Boiling point of second liquid ranged from 98-101 deg C. Told students to swap out at 97 deg C.
Students did the Fractional Distillation Day 2. The liquid density and flammability will have to wait until next time.
1. Successfully perform a fractional distillation
2. Using a microscope, describe and sketch a diagnostic crystal shape
3. Determine the density of liquids
4. Use the flammability test to determine if liquids are flammable.
Told students to sketch a large, diagnostic picture of the new crystals. Since they do not have to write down the temperature every 30 seconds, one partner can monitor the distillation while the other checks out the crystals. If they have good crystals, they do not have to redo the crystal part of this lab.
Went over procedure to find the density of liquids. Drew pictures and wrote description for each step.
1. Find mass of 5 ml graduated cylinder using electronic balance
2. Using a pipette put 5 ml of liquid into the 5 ml graduated cylinder. (If you don't have 5 ml of liquid, use what you do have)
3. Measure the liquid volume at eye level at the bottom of the meniscus
This will give you the volume of the liquid you use in the density calculation.
4. Find mass of the graduated cylinder + liquid
5. Subtract the mass of the graduated cylinder+liquid - mass of empty graduated cylinder to find the mass of the liquid.
6. Calculate the density using density = mass of liquid/volume liquid. Units of density should be g/cm^3
This time I remembered to sketch the data table on the board so students could see how to organize their data.
Demonstrated how to do the flammability test. Note that this is different from the "flame test" which we will cover later.
Alcohol lamp is on the left, coffee can with 2-3 inches of water is on the right. Move hand from left to right and then drop strip into can of water. Make sure you remove the flammability strips from the water and throw them into the garbage before dumping the water into the sink.
Went over the graphs from Day 1 Fractional Distillation. Boiling points of liquid 1 ranged from 80-85 deg C. Told students to swap out test tubes at 85 deg C.
Boiling point of second liquid ranged from 98-101 deg C. Told students to swap out at 97 deg C.
Students did the Fractional Distillation Day 2. The liquid density and flammability will have to wait until next time.
Monday, April 6, 2009
Monday, April 6, 2009 - Block 4B
Students wrote down content objectives in their notebooks.
1. Successfully perform a fractional distillation
2. Using a microscope, describe and sketch a diagnostic crystal shape
3. Determine the density of liquids
4. Use the flammability test to determine if liquids are flammable.
Went over procedure to find the density of liquids. Drew pictures and wrote description for each step.
1. Find mass of 5 ml graduated cylinder using electronic balance
2. Using a pipette put 5 ml of liquid into the 5 ml graduated cylinder. (If you don't have 5 ml of liquid, use what you do have)
3. Measure the liquid volume at eye level at the bottom of the meniscus
This will give you the volume of the liquid you use in the density calculation.
4. Find mass of the graduated cylinder + liquid
5. Subtract the mass of the graduated cylinder+liquid - mass of empty graduated cylinder to find the mass of the liquid.
6. Calculate the density using density = mass of liquid/volume liquid. Units of density should be g/cm^3
Demonstrated how to do the flammability test. Note that this is different from the "flame test" which we will cover later.
Alcohol lamp is on the left, coffee can with 2-3 inches of water is on the right. Move hand from left to right and then drop strip into can of water. Make sure you remove the flammability strips from the water and throw them into the garbage before dumping the water into the sink.
Went over the graphs from Day 1 Fractional Distillation. Boiling points of liquid 1 ranged from 80-85 deg C. Told students to swap out test tubes at 85 deg C.
Boiling point of second liquid ranged from 98-101 deg C. Told students to swap out at 97 deg C.
While the liquids are heating, lab partners can take turns checking out their crystals from day 1. If they have good crystals, they do not have to redo the crystal part of this lab.
Students did the Fractional Distillation Day 2. Several students were able to find the density and some finished the flammability test as well.
1. Successfully perform a fractional distillation
2. Using a microscope, describe and sketch a diagnostic crystal shape
3. Determine the density of liquids
4. Use the flammability test to determine if liquids are flammable.
Went over procedure to find the density of liquids. Drew pictures and wrote description for each step.
1. Find mass of 5 ml graduated cylinder using electronic balance
2. Using a pipette put 5 ml of liquid into the 5 ml graduated cylinder. (If you don't have 5 ml of liquid, use what you do have)
3. Measure the liquid volume at eye level at the bottom of the meniscus
This will give you the volume of the liquid you use in the density calculation.
4. Find mass of the graduated cylinder + liquid
5. Subtract the mass of the graduated cylinder+liquid - mass of empty graduated cylinder to find the mass of the liquid.
6. Calculate the density using density = mass of liquid/volume liquid. Units of density should be g/cm^3
Demonstrated how to do the flammability test. Note that this is different from the "flame test" which we will cover later.
Alcohol lamp is on the left, coffee can with 2-3 inches of water is on the right. Move hand from left to right and then drop strip into can of water. Make sure you remove the flammability strips from the water and throw them into the garbage before dumping the water into the sink.
Went over the graphs from Day 1 Fractional Distillation. Boiling points of liquid 1 ranged from 80-85 deg C. Told students to swap out test tubes at 85 deg C.
Boiling point of second liquid ranged from 98-101 deg C. Told students to swap out at 97 deg C.
While the liquids are heating, lab partners can take turns checking out their crystals from day 1. If they have good crystals, they do not have to redo the crystal part of this lab.
Students did the Fractional Distillation Day 2. Several students were able to find the density and some finished the flammability test as well.
Friday, April 3, 2009 - Block 4A
Students wrote down content objectives in their notebooks.
Student will be able to:
Plot heating and cooling curves and identify the melting/freezing temperature and boiling temperatures, phases (solid, liquid, gas), and processes (heating, cooling, freezing, boiling, etc.)
Plot heating curves for multiple liquids and identify the boiling points and swap out temperatures for a distillation lab
Using chemical formulas, be able to identify the different elements, count the number of different elements, count the number of atoms of each element, count the total number of atoms in the substance.
I told students that no more late work would be accepted.
Discussed graph from PDB lab. Showed how to annotate it.
Students did the Boiling Point worksheet. Went over it in class, did not collect it.
Went over Fractional Distillation Day 1.
Purpose of Day 1: Find the heating curve for a mixture of two liquids.
From the graph, determine the boiling points of the two liquids and find the swap out temperatures.
Sketched lab set-up on board.
Keep a slow boil. Once you get a good boil, try to keep the wire gauze in that position. Moving it too often could mess up your heating curve.
Stop when you have only 1 cm of liquid left in the boiling test tube. Remember to raise the rubber tubing above the level of the collected liquid before capping the alcohol lamp.
Use a piece of masking tape to put your name on a petrie dish. Take a few drops of the remaining liquid from the burning test tube and put it in the petrie dish.
Dump the collected liquid and the rest of the liquid from the boiling test tube into the funnel with filter paper.
Plot the heating curve for homework.
Student will be able to:
Plot heating and cooling curves and identify the melting/freezing temperature and boiling temperatures, phases (solid, liquid, gas), and processes (heating, cooling, freezing, boiling, etc.)
Plot heating curves for multiple liquids and identify the boiling points and swap out temperatures for a distillation lab
Using chemical formulas, be able to identify the different elements, count the number of different elements, count the number of atoms of each element, count the total number of atoms in the substance.
I told students that no more late work would be accepted.
Discussed graph from PDB lab. Showed how to annotate it.
Students did the Boiling Point worksheet. Went over it in class, did not collect it.
Went over Fractional Distillation Day 1.
Purpose of Day 1: Find the heating curve for a mixture of two liquids.
From the graph, determine the boiling points of the two liquids and find the swap out temperatures.
Sketched lab set-up on board.
Keep a slow boil. Once you get a good boil, try to keep the wire gauze in that position. Moving it too often could mess up your heating curve.
Stop when you have only 1 cm of liquid left in the boiling test tube. Remember to raise the rubber tubing above the level of the collected liquid before capping the alcohol lamp.
Use a piece of masking tape to put your name on a petrie dish. Take a few drops of the remaining liquid from the burning test tube and put it in the petrie dish.
Dump the collected liquid and the rest of the liquid from the boiling test tube into the funnel with filter paper.
Plot the heating curve for homework.
Thursday, April 2, 2009
Thursday, April 2, 2009 - Block 4B
Students wrote down content objectives in their notebooks.
Student will be able to:
Plot heating and cooling curves and identify the melting/freezing temperature and boiling temperatures, phases (solid, liquid, gas), and processes (heating, cooling, freezing, boiling, etc.)
Plot heating curves for multiple liquids and identify the boiling points and swap out temperatures for a distillation lab
Using chemical formulas, be able to identify the different elements, count the number of different elements, count the number of atoms of each element, count the total number of atoms in the substance.
I told students that no more late work would be accepted.
Discussed graph from PDB lab. Showed how to annotate it.
Students did the Boiling Point worksheet. Went over it in class, did not collect it.
Went over Fractional Distillation Day 1.
Purpose of Day 1: Find the heating curve for a mixture of two liquids.
From the graph, determine the boiling points of the two liquids and find the swap out temperatures.
Sketched lab set-up on board.
Keep a slow boil. Once you get a good boil, try to keep the wire gauze in that position. Moving it too often could mess up your heating curve.
Stop when you have only 1 cm of liquid left in the boiling test tube. Remember to raise the rubber tubing above the level of the collected liquid before capping the alcohol lamp.
Use a piece of masking tape to put your name on a petrie dish. Take a few drops of the remaining liquid from the burning test tube and put it in the petrie dish.
Dump the collected liquid and the rest of the liquid from the boiling test tube into the funnel with filter paper.
Plot the heating curve for homework.
Student will be able to:
Plot heating and cooling curves and identify the melting/freezing temperature and boiling temperatures, phases (solid, liquid, gas), and processes (heating, cooling, freezing, boiling, etc.)
Plot heating curves for multiple liquids and identify the boiling points and swap out temperatures for a distillation lab
Using chemical formulas, be able to identify the different elements, count the number of different elements, count the number of atoms of each element, count the total number of atoms in the substance.
I told students that no more late work would be accepted.
Discussed graph from PDB lab. Showed how to annotate it.
Students did the Boiling Point worksheet. Went over it in class, did not collect it.
Went over Fractional Distillation Day 1.
Purpose of Day 1: Find the heating curve for a mixture of two liquids.
From the graph, determine the boiling points of the two liquids and find the swap out temperatures.
Sketched lab set-up on board.
Keep a slow boil. Once you get a good boil, try to keep the wire gauze in that position. Moving it too often could mess up your heating curve.
Stop when you have only 1 cm of liquid left in the boiling test tube. Remember to raise the rubber tubing above the level of the collected liquid before capping the alcohol lamp.
Use a piece of masking tape to put your name on a petrie dish. Take a few drops of the remaining liquid from the burning test tube and put it in the petrie dish.
Dump the collected liquid and the rest of the liquid from the boiling test tube into the funnel with filter paper.
Plot the heating curve for homework.
Wednesday, April 1, 2009
Wednesday April 1, 2009 - Block 4A
Had students go to the front board and sketch their PDB heating and cooling curves. Discussed the results. Allowed students to check/add annotation on the graphs and then collected the reports. Guess that went ok but several students just did not do the assignment and did not make their graphs.
Handed back the Reading Assignments that several students did not hand in. I wanted to go over the material but students were not that interested. Eventually I gave up and handed out the finding boiling point worksheet and kinetic theory worksheets.
Maybe I should have just done the Fractional Distillation Lab since the students weren't learning anything, but then again, students ignored what I told them about the fractional distillation lab when they did the boiling point worksheet.
Just a bad day at class - have to figure out what to change for tomorrow's class.
Handed back the Reading Assignments that several students did not hand in. I wanted to go over the material but students were not that interested. Eventually I gave up and handed out the finding boiling point worksheet and kinetic theory worksheets.
Maybe I should have just done the Fractional Distillation Lab since the students weren't learning anything, but then again, students ignored what I told them about the fractional distillation lab when they did the boiling point worksheet.
Just a bad day at class - have to figure out what to change for tomorrow's class.
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