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

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.

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

• 
  

MATERIALS


Bunsen burner


tongs


battery


scale


clay triangle


ring stand


crucible


wire


magnesium


distilled water


striker





PROCEDURE


1 zero scale and find wieght of crucible


2 attach bunsen burner to gas nozzle


3 put ring stand over bunsen burner with clay triangle on top of it


4 find wieght of magnesium strip


5 put magnesium strip in glass


6 turn on gas till you hear it


7 use striker to light the bunsen burner


8 let the magnesium strip heat for two and half minutes or so


9 use tongs to take out magnesium


10 put magnesium back in crucible and do not look!!!!!!!!!!


11 After its burnt out and done wiegh the crucible but make sure its cooled down


12 Now add distilled water and stir it up


13 now take one end of the wire and put it in the water


14 take the other end and put the two wires on each side of the battery


15 now the faint light will show in middle of two as you watch


16 now clean up worstation and wipe down crucible with clean water





RESULTS


it caused the light to light up in the middle, and the crucible stayed same throughout the experiment

ERRORS
If it wouldnt have went wrong

Sam's Magnesium Lab

Magnesium Lab

Sam Goodson

1-19-2012

Safety

**Before doing anything please make sure that any long sleeves are rolled up, baggy sweatshirts are taken off, and you are always wearing goggles! If you have any questions or concerns please ask a teacher first. DO NOT LOOK AT IGNITED MAGNESIUM

Materials

• Crucible
• Tongs
• Ring Stand
• Clay Triangle
• Bunsen Burner
• Striker
• Scale
• 1g of Magnesium Ribbon
• Distilled Water
• Various sizes of batteries
• Light Strip
• Wire Strippers

Procedure

1. Find crucible and weight it before doing anything using a scale
2. Setup ringstand over bunsen burner and place clay triangle on the stand
3. Attach bunsen burner to gas (do not ignite)
4. Find and weight magnesium ribbon
5. Place ribbon in crucible
6. Turn gas on and light the bunsen burner
7. Adjust heat so the tip of the flame barely touches the bottom of the crucible
8. Let heat for 2-3 minutes
9. If the magnesium doesn't ignite then use the tongs and pull a piece of ribbon out and place it in the flame until it ignites. DO NOT LOOK AT RIBBON place ribbon    back in crucible.
10. Wait for magnesium to burn out
11. Weigh the crucible after it has cooled off and compare with beginning weight plus the weight of the ribbon
12. Add distilled water to magnesium and stir
13. Take a light strip and strip the ends and connect them to clamps and place them in the mixture
14. Take the other ends and hook them to various sizes of batteries and see if a light goes on inside one of the lights
15. When cleaning out crucible dump mixture in TRASH and wipe out carefully with a paper towel.

Results

For my results I noticed that the crucible was the same after igniting the magnesium as it was before if you would add the weight of the crucible and the ribbon. After a while a faint red light came on in the light strip when it was in the mixture with two d batteries.

Errors

If anything went wrong in this lab it would have been when I weighed the magnesium. The scale was zeroed at first but after I took the ribbon off it went to -.3g.

Analysis

1. Mg before = .4         Mg After = .4        Increase = 0
2. The energy given off was Kinetic Energy due to the light and heat that was given off during the reaction
3. Due to the bright light when it burned it seems like Magnesium reacts with air.
4. Mgo; Mg3N2
5. Because of the light and energy, Mgo and Mg3N2 are mostly Nitrogen and Oxygen.
6. It's an ionic bond because it is 1 metal and 1 nonmetal that form together chemically.
7. If a loss of mass occurred than, more than likely, there was probably left over Magnesium in the bottom of the crucible.
8. Magnesium supports strong bones, a healthy immune system, muscle development, and nerve development.
9. Magnesium is commonly used for heartburn relief and to calm sore stomachs. It is often used in the form of Magnesium Hydroxide.

Magnesium Lab! :) -Haleigh Meier

Magnesium Lab

Materials needed:

• Bunsen Burner
• Clay Triangle
• Ring Stand
• Crucible
• Magnesium
• Scale
• Battery
• Cables
• Christmas lights
• Tongs

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Safety:

ALWAYS wear safety goggles to protect your eyes from getting anything harmful into your eyes. Be careful using the magnesium! Use the tongs...they are your friend, they are there to help you. The UV rays the magnesium emits can seriously damage your eyes, so DO NOT LOOK DIRECTLY AT THE MAGNESIUM WHEN LIT!!!!

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Procedure:

Have your materials all together, and have it all set up. Use the scale to find the mass of your crucible. Zero the scale, then put down one strip at a time on the scale until it shows a number. Keep the mass of the magnesium you use between .1g-.3g. Roll the magnesium into a very loose ball, and put in the crucible. You need to then put the crucible on the clay triangle that is on the ring stand over the bunsen burner. Have the flame on the bunsen burner barely touching the crucible so the magnesium will ignite. Put the lid on the crucible and wait a couple minutes. if the magnesium doesn't light after a few minutes, take the lid off the crucible and wait a couple more minutes. If you are still having problems with it igniting after that, then using tongs/tweezers, take out one of the strips of magnesium, and put it right in the flame. As soon as you put it directly in the flame, you need to immediately put it back in the crucible. This is where you definitely do not want to look directly at the magnesium. Try to look out of the corner of your eyes if you can! When it is done burning, you will use the tongs, and grab the crucible (don't touch with hands, it is still hot) and mass the crucible with whatever is left of the magnesium inside. After massing the crucible with contents, put distilled water in the crucible with the left over magnesium, and stir. You now get to find out if it will conduct electricity! Put a circuit connected to a little strand of Christmas lights, and connect that to the batteries. If the lights come on, even if it is a low light, you will know your magnesium can conduct electricity. If it does not conduct electricity, however, then you may have done something wrong.

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Book Questions:

1) Use the masses in the table to calculate the mass of the magnesium ribbon and the mass of the magnesium product. Record these masses in the table.

Before: .10g

After: .10g

2) What kind of energy was released by the reaction? What can you conclude about the product of this reaction?

This reaction created electric energy. Because the Christmas lights lit up when we used the cables and the batteries, it proves there was electronegativity.

3) How do you know that the magnesium metal reacts with certain components of the air?

Because when it ignited, it had a change of color, and gave off heat.

4) Magnesium reacts with both oxygen and nitrogen from the air at the high temperature of the crucible. Predict the binary formulas for both products. Write the names of these two compounds.

MgO and Mg^5N^2

5)The product formed from magnesium and oxygen is white, and the product formed from magnesium and nitrogen is yellow. From your observations, which compound makes up most of the product?

Oxygen makes up most of the product. We know this because it first burned yellow, only to change to a white color.

6) Did the magnesium compounds and water conduct an electric current? Do the results indicate whether or not the compounds are ionic?

Yes, they conducted an electric current. The compound is ionic.

7)If the magnesium loses mass instead of gaining mass, what do you think was a possible source of the error?

With my group, we didn't have a change in mass, so we probably didn't do it exactly right.

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1)The magnesium ion plays an important role in a person's biochemistry. Research the role of this electrolyte in your physical and mental health. Is magnesium listed as a component in a multi-vitamin and mineral tablet?

Approximately 50% or total body magnesium is found in bone. The other half is found inside cells of body tissues and organs. Only 1% of magnesium is found in blood, but levels stay constant. Magnesium(Mg2+) is also an electrolyte supplement that helps with my heart condition, Neurocardiogenic Syncope.

2) Research the use of Mg(OH)2 in every day products. What is Mg(OH)2 commonly called in over-the-counter drugs?

milk of magnesia

Materials
Clay Ring
Scale
Magnesium
Bunsen Burner
Ring Stand
Crucible with lid

Safety
Wear Safety Goggles
Tongs
Dont Look at the Burning Light

Procedure
Get all the Materials Needed
Get Weight of Crucible
Get Magnesium stripes and weigh them
Turn on the Bunsen Burner so the Flame is just Touching the Bottom of the Crucible
Now see the magnesium catch on fire
When Dont Burning Mass the Crucible with the Contents inside
Add Distilled Water to the Crucible and Stir and Watch to see if it conducts Electricity and Connect to Batteries

Question
1. Before .17 g after .22g difference .05g
2. electric engery and lelctricity is created
3. chang of smell or color
4. MgO & Mg^5N^2
5. compound is mostly nitrogen and oxygen, it gives off different colors.
6. yes and no
7. didnt burn al the magnesium
8. Magnesium the fourth most abundant in the body. Most multi-vitamins contain magnesium
9. milk of magnesia