Chemical Analysis CH2O Jöns Jacob Berzelius C6H12O6 Chemistry Essentials - 002 bozemanscience.com Chemical Analysis Compounds made of Atoms Mass Percent Specific mass Composition Empirical Formula Purity bozemanscience.com Determine empirical formula: Vitamin C > Analysis! >! > 61.38 g CARBON! > 6.87 g HYDROGEN! > 81.75 g OXYGEN! > Done! >" bozemanscience.com Explanation 2.5 grams 2.5 g/brick 1 brick 10 grams 2.5 g/brick 4 bricks 80 grams 2.5 g/brick 32 bricks bozemanscience.com How many bricks? 1 brick 320 grams X = 128 bricks 2.50 grams bozemanscience.com Element 197 grams 197 grams/mol 1 mol 788 grams 197 grams/mol 4 mol 6304 grams 197 grams/mol 32 mol bozemanscience.com Convert to mole: 1 mol 56.7 grams X = .288 mole 197 grams bozemanscience.com Determine empirical formula: Vitamin C > Analysis! >! > 61.38 g CARBON! > 6.87 g HYDROGEN! > 81.75 g OXYGEN! > Done! >" bozemanscience.com Determine empirical formula: ! 61.38 g C! 1 mol X = 5.11 mol C ! 12.01 g C 6.87 g H! 1 mol X = 6.80 mol H ! 1.01 g H 81.75 g O" 1 mol X = 5.11 mol O 16.00 g O bozemanscience.com Determine empirical formula: 5.11 mol C / 5.11 = 1 CH1.33O 6.80 mol H / 5.11 = 1.33 C3H4O3 Empirical Formula 5.11 mol O / 5.11 = 1 Vitamin C bozemanscience.com Purity > Analysis! >! Vitamin C > 61.38 g CARBON! > 6.87 g HYDROGEN! > 81.75 g OXYGEN! > .006 g MERCURY! > .013 g PALLADIUM! > DONE! >" bozemanscience.com Chemical Analysis made of Atoms Mass Percent Composition Purity bozemanscience.com Chemical Analysis Compounds made of Atoms Mass Percent Specific mass 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. bozemanscience.com 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. bozemanscience.com www.bozemanscience.com.