Chemical Analysis
CH2O
Jöns Jacob Berzelius
C6H12O6
Chemistry Essentials - 002
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Chemical Analysis
Compounds
made of
Atoms
Specific mass
Mass Percent
Composition
Empirical Formula
Purity
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Determine empirical formula:
Vitamin C
> Analysis!
>!
> 61.38 g CARBON!
> 6.87 g HYDROGEN!
> 81.75 g OXYGEN!
> Done!
>
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Explanation
2.5 grams
1 brick
2.5 g/brick
10 grams
4 bricks
2.5 g/brick
80 grams
32 bricks
2.5 g/brick
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How many bricks?
320 grams
X
1 brick
= 128 bricks
2.50 grams
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Element
197 grams
1 mol
197 grams/mol
788 grams
4 mol
197 grams/mol
6304 grams
32 mol
197 grams/mol
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Convert to mole:
56.7 grams
X
1 mol
= .288 mole
197 grams
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Determine empirical formula:
Vitamin C
> Analysis!
>!
> 61.38 g CARBON!
> 6.87 g HYDROGEN!
> 81.75 g OXYGEN!
> Done!
>
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Determine empirical formula:
!
61.38 g
C!
X
!
6.87 g
H!
X
!
81.75 g
O
X
1 mol
12.01 g C
1 mol
1.01 g H
1 mol
16.00 g O
=
5.11 mol C
=
6.80 mol H
=
5.11 mol O
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Determine empirical formula:
5.11 mol C
/ 5.11 = 1
6.80 mol H
/ 5.11 = 1.33
5.11 mol O
Vitamin C
/ 5.11 = 1
CH1.33O
C3H4O3
Empirical Formula
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Purity
Vitamin C
> Analysis!
>!
> 61.38 g CARBON!
> 6.87 g HYDROGEN!
> 81.75 g OXYGEN!
> .006 g MERCURY!
> .013 g PALLADIUM!
> DONE!
>
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Chemical Analysis
made of
Atoms
Mass Percent
Composition
Purity
bozemanscience.com
Chemical Analysis
Compounds
made of
Atoms
Specific mass
Mass Percent
Composition
Empirical Formula
Purity
bozemanscience.com
Did you learn?
Use mass data to identify or infer composition of
pure substances and/or mixtures.
Use mass data in order to justify a claim regarding
the identity and/or estimated purity of a substance.
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Acknowledgements
“File:2oz Gold Engelhard.JPG,” March 26, 2013. http://en.wikipedia.org/w/index.php?title=File:2oz_gold_Engelhard.JPG&oldid=502536502.
File:Ascorbic Acid (2).JPG, n.d. http://commons.wikimedia.org/wiki/File:Ascorbic_acid_(2).JPG.
“File:Ascorbic-Acid-from-Xtal-1997-3D-Balls.png,” July 29, 2013. http://en.wikipedia.org/wiki/File:Ascorbic-acid-from-xtal-1997-3D-balls.png.
“File:D-Glucose-Chain-3D-Balls.png,” July 29, 2013. http://en.wikipedia.org/wiki/File:D-glucose-chain-3D-balls.png.
File:FAB MS.jpg, n.d. http://commons.wikimedia.org/wiki/File:FAB_MS.jpg.
File:Gold Bar.png, n.d. http://commons.wikimedia.org/wiki/File:Gold_bar.png.
“File:Jöns Jacob Berzelius.jpg,” July 29, 2013. http://en.wikipedia.org/wiki/File:J%C3%B6ns_Jacob_Berzelius.jpg.
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