M7 Part A

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Michelle Dong 1F
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Joined: Fri Sep 29, 2017 7:04 am

M7 Part A

Postby Michelle Dong 1F » Mon Oct 02, 2017 5:22 pm

M.7 Solid boron can be extracted from solid boron oxide by reaction with magnesium metal at a high temperature. A second product is solid magnesium oxide. (a) Write a balanced equation for the reaction.

I'm confused as to how to come up with the chemical formula of boron oxide and solid boron without looking it up on Google.

Ethan-Van To Dis2L
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

Re: M7 Part A

Postby Ethan-Van To Dis2L » Mon Oct 02, 2017 5:55 pm

You can tell the formula for boron oxide is B2O3 based on what group each element is in. Since boron is in group 13 it'll have a charge of +3 and since oxygen is in group 16 it'll have a charge of -2. Then you simply make sure the charges match each other by changing the number of elements. B2 would have a charge of +6 and O3 would have a charge of -6 so then you get B2O3. And for the chemical formula of solid boron it would be just B since its a metal.
Here's a link with some basic charges: http://www.westfield.ma.edu/cmasi/gen_c ... xuvmNE.png
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