Sunday, February 12, 2012
Study Guide 1-3 Advanced (D)
Was having some Youtube issues so I am posting the answers. You can see the pictures in class tomorrow.
1. MnO2 2. trigonal bipyramidal, 90/120, sp3d, and nonpolar 3. show in class
4. trigonal pyramidal, 107.3, sp3, polar 5. silver chromate 6. show in class
7. sulfur dioxide 8. show in class 9. show in class
10. trigonal bipyramidal, 90/120, sp3d, polar 11. Copper (II) oxide 12 Diarsenic trioxide
13. octahedral, 90, sp3d2, nonpolar 14. Fe2(S2O3)3 15. Selenium Trioxide 16. Show in class 17. Niobium (III)Phoshpide 18. Mg(OH)2 19. Show in class 20. trigonal planar, 120, sp2, nonpolar 21. show in class 22. C 23. d 24. b 25. d 26. d 27. b 28. c 29. a 30. c 31. b
1. MnO2 2. trigonal bipyramidal, 90/120, sp3d, and nonpolar 3. show in class
4. trigonal pyramidal, 107.3, sp3, polar 5. silver chromate 6. show in class
7. sulfur dioxide 8. show in class 9. show in class
10. trigonal bipyramidal, 90/120, sp3d, polar 11. Copper (II) oxide 12 Diarsenic trioxide
13. octahedral, 90, sp3d2, nonpolar 14. Fe2(S2O3)3 15. Selenium Trioxide 16. Show in class 17. Niobium (III)Phoshpide 18. Mg(OH)2 19. Show in class 20. trigonal planar, 120, sp2, nonpolar 21. show in class 22. C 23. d 24. b 25. d 26. d 27. b 28. c 29. a 30. c 31. b
Study Guide 2-3 (C)
Was having some YouTube issues so I am posting the answers and will make sure you can see the pictures in class.
1. Iron (II) Phosphate 2. Will show in class 3. Carbon Tetrachloride 4. Sodium Bromide
5. Show pic in class Li+ O2- Chemical formula:Li2O 6. Pic in class bent, 104.5, sp3, polar
7. CF2 8. show in class 9. tetrasulfur tetranitride 10. MnO2 11. Show in class 12. pic in class, Al +3 S-2 chemical formula: Al2S3 13. pic in class, K+ Cl- Chemical formula :KCl 14. carbon monoxide
15. Potassium Hydroxide 16. BaCl2 17. pic in class, trigonal bipyramidal, 90/120, sp3d, polar
18. linear, 180, sp, nonpolar
19. D 20. D. 21. A 22. D 23. A 24. C 25. B 26. C 27. B 28. B
1. Iron (II) Phosphate 2. Will show in class 3. Carbon Tetrachloride 4. Sodium Bromide
5. Show pic in class Li+ O2- Chemical formula:Li2O 6. Pic in class bent, 104.5, sp3, polar
7. CF2 8. show in class 9. tetrasulfur tetranitride 10. MnO2 11. Show in class 12. pic in class, Al +3 S-2 chemical formula: Al2S3 13. pic in class, K+ Cl- Chemical formula :KCl 14. carbon monoxide
15. Potassium Hydroxide 16. BaCl2 17. pic in class, trigonal bipyramidal, 90/120, sp3d, polar
18. linear, 180, sp, nonpolar
19. D 20. D. 21. A 22. D 23. A 24. C 25. B 26. C 27. B 28. B
Tuesday, February 7, 2012
Magnesium Burning Lab
Materials
1.Crucible
2.Magnesium
3.Scale
4.Bunsen Burner
5.Ring Stand
Safety:
1. Do not look at burning magnesium, bright enough to harm eyes.
2. Wear safety goggles.
3. Use the tongs to hold magnesium.
Procedure:
1. Record the mass of the crucible
2. Take strips of magnesium and weigh them
3. Turn on the bunsen burner below the crucible
4. Make a ball with the magnesium strips and place them in the crucible
5. Put the lid on the crucible and wait for the magnesium to light, if it does not light, then take the lid off and use the tongs to take a strip of magnesium out and light it, then look through corner of eye and place in the crucible.
6. After it is all burned in the crucible, turn off the bunsen burner and then weigh it and subtract the weight of the crucible.
7. After that hook it up to the batteries and the lights to see if it conducts electricity.
Question:
1.Magnesium Before-.17g Magnesium After-.22g Increase-.05g
2.The burning magnesium produced lots of light which means that it was electrical energy.
3.We know it reacts with the air because when it burned it gave off a very bright light.
4.MgO Mg^3N^2
5.The product has to be made up of mostly oxygen because the majority of the light when it was burning was white.
6.The magnesium conducted electricity and it was an ionic bond because a nonmetal and metal were the two elements bonding.
7.If the magnesium was only partially burned and strips of magnesium were left then the mass could have increased.
8.The majority of magnesium in our bodies is found in our bones. Other magnesium is in tissues and organs and it is an ingredient in multi vitamins.
9.Milk of magnesia.
1.Crucible
2.Magnesium
3.Scale
4.Bunsen Burner
5.Ring Stand
Safety:
1. Do not look at burning magnesium, bright enough to harm eyes.
2. Wear safety goggles.
3. Use the tongs to hold magnesium.
Procedure:
1. Record the mass of the crucible
2. Take strips of magnesium and weigh them
3. Turn on the bunsen burner below the crucible
4. Make a ball with the magnesium strips and place them in the crucible
5. Put the lid on the crucible and wait for the magnesium to light, if it does not light, then take the lid off and use the tongs to take a strip of magnesium out and light it, then look through corner of eye and place in the crucible.
6. After it is all burned in the crucible, turn off the bunsen burner and then weigh it and subtract the weight of the crucible.
7. After that hook it up to the batteries and the lights to see if it conducts electricity.
Question:
1.Magnesium Before-.17g Magnesium After-.22g Increase-.05g
2.The burning magnesium produced lots of light which means that it was electrical energy.
3.We know it reacts with the air because when it burned it gave off a very bright light.
4.MgO Mg^3N^2
5.The product has to be made up of mostly oxygen because the majority of the light when it was burning was white.
6.The magnesium conducted electricity and it was an ionic bond because a nonmetal and metal were the two elements bonding.
7.If the magnesium was only partially burned and strips of magnesium were left then the mass could have increased.
8.The majority of magnesium in our bodies is found in our bones. Other magnesium is in tissues and organs and it is an ingredient in multi vitamins.
9.Milk of magnesia.
Wednesday, February 1, 2012
Magnesium lab
Materials
- Bunsen Burner
- Cruicble
- Ring stand
- Tongs
- Striker
- Scale
- 1g magnesium Ribbon
- various size of batteries
- Distilled water
- light strip
- wire strippers
Procedure
- zero the scale and weigh the crucible
- attach the bunsen burner to the gas nozzle
- Find and weight magnesium ribbon
- place the ribbon in the crucible
- turn the gas on light the bunsen burner
- adjust the heat so the tip barley touches the the bottom of the crucible
- let it heat for 2 1/2 minutes or so
- use the tongs to pull out the ribbon do not look at the ribbon!!!! then place it back in
- wait for the magnesium to burn out
- weigh the crucible then compare it with the beginning weight and the weight of the ribbon
- add distilled water to the magnesium then stir
- take the other ends and hook them to various sizes or batteries to see if a light turns on
- when cleaning out crucible dumb mixture in trash and wipe out with a paper towel
Results
I noticed that the crucible was the same weight after igniting and before igniting the magnesium. a faint red light would come on in the light strip while in the mixture with the 2 batteries.
Errors
I didnt notice any errors.
Analysis
- Mg=.4 Mg after=.4 increase=0
- the energy given off was kinetic energy cause of the the light and the heat given off during the reaction
- due to the bright light given off during the reaction magnesium reacts with air
- Mgo, Mg3N2
- because of the light and energy Mgo and Mg3N2 are mainly made up of nitrogen and oxygen
- its a ionic b0nd cause 1 metal and 1 nonmetal that form together
- if a loss in mass occurred then there was probably left over magnesium in the crucible
- magnesium supports a healthy immune system, strong bones, muscle development, and nerve development
- magnesium is commonly used for heartburn to calm stomachs, often used in the form of magnesium hyrdroxide
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