Saftey Concerns
1. Wear goggles while in the lab
2. Tie back loose clothing and hair
3. Do not look directly at the burning magnesium, could blind temporarily of permenatley
4. Do not handle the heated crucible until it has cooled
Supplies
1. Magnesium ribbon
2. Crucible
3. Ring stand
4. Clay triangle
5. Bunsen Burner
6. Stirring rod
7. Crucible tongs
8. Electronic balance
9. Distiller water
10. Conductivity tester
11. FLint striker or some fire making device
Procedure
First gather all the supplies needed to do the lab. Then place the crucible on the electronic balance and calculate the mass of the crucible by its self. After that take a magnesium ribbon and place that on the electronic balance. After calculated place the magnesium ribbon into the crucible and mass both together. Then place the crucible with the magnesium on the clay triangle that is located on the ring stand. Turn on the laboratory burner and light the flame. With the lid on the crucible wait two minutes to see if the magnesium will combust. If the magnesium has not combusted after two minutes take the lid off and wait two minutes to see if the magnesium will combust. If at the end of this and the magnesium has not combusted use the crucible tongs and pick up the magnesium and physically place it within the fire. When the magnesium begins to sparkle be ready to look away. Magnesium burns hot and bright producing a UV light that is harmful to eyes, do not look directly at it. While burning a place the magnesium back in the crucible and turn the burner off. Notice how the crucible glows with the magnesium in it. After the magnesium has stopped burning wait until the the crucible cools, then use the tongs to put the crucible on the electronic balance and calculate the mass of the burned product and crucible.
After calculating the mass, we too the crucible and put 5ml of distilled water into the crucible. We then used a stirring rod to mix the to components into a solution. After stirred we took two D baterries, two alligator clips and a strand of two or three christmas lights. we connected them all together and put the alligator clips into the solution to see if it would hold the current and light the strand of lights.
Data and results
The crucible by itself was massed at 21.82g.
The crucible along with two ribbons of magnesium was massed at 21.95g
The magnesium solution was also conductive
Errors
Errors that could have interfered with the results include:
When lighting the magnesium manually outside of the crucible the oxygen being absorbed did not contribute to the mass after putting it back into the crucible.
Another could also be if you didn't calculate the masses accurately.
Analysis
1. The ribbons of magnesium were massed at .13g and after burned the magnesium product was massed at .01g
2. The energy released during this lab was exoteric energy. The energy gave off a lot of light and a lot of heat. The product after the energy was released was .01g heavier than at the beginning of the lab.
3. After the magnesium burned a white product was left inside the crucible. The white pigment indicated that the magnesium reacted mostly with the oxygen in the air.
4. Since the magnesium reacted more with the oxygen the chemical compound would look like this. MgO. also known as magnesium oxide. If the magnesium would have reacted more with the nitrogen in the air the compound would look like this. Mg3N2. also known as magnesium nitride.
5. After burned we can conclude that oxygen reacted most with the magnesium due to the white pigment displayed.
6. When the magnesium was mixed with distilled water and tested to sdee if the solution was conductive, it came back as positive. The magnesium solution had a conductive quality to it since the solution was ionic.
7. Errors that could have ocurred might include masses the objects inacurrately and also leaving the burning magnesium outside of the crucible for to long which would affect the total mass after burned.
1. Magnesium is found in many multi-vitamins and mineral tablets, and is the fourth most abundant mineral in the human body. Magnesium is needed to make over 300 biochemical reactions within the human body.
2. Magnesium Hydroxide ( Mg(OH)2) is also known as "tums" or antacids in over the counter drugs. This is also known as the "Milk of Magnesium"
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