Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Fundz on September 08, 2008, 06:53:55 PM
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While burning magnesium (ribbon) what are some qualitative and quantitative observations before you burn it, while you burn it, and after you burn it.
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To show you I tried:
Before: Malleable, gray in color?, about 5 cm long, 3 mm thick.. don't know any more.
During: Very bright, smoke is released, don't know any more.
After: Loss shape, white in color, leaves ash on glass, don't know anymore..
Help? :confused:
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Looks more or less OK to me. Does it burn cold, or hot?
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I am unsure. Unfortunately I merely observed the experiment, I didn't perform it.
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How do you think? Whoever did the experiment, how did s/he held the magnesium?
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You can observe the mass change of Mg for the reaction since when magnesium metal burns in air, the possible products are MgO and Mg3N2 solids which may result in a definite mass change.
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Based off the procedure I am fairly certain it was a hot one.
As far as calculating mass change it is something I've yet to learn, but maybe we will go over it and I'll be able to do it.
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You can observe the mass change of Mg for the reaction since when magnesium metal burns in air, the possible products are MgO and Mg3N2 solids which may result in a definite mass change.
You can write about mass changes only if you have weighted substance before and after experiment. Doesn't look to me like it was done.