Experiment 4

# Experiment 4 - carbonate hydrogen carbonate Mass of...

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Experiment 5: Identification of a Compound by Mass Relationships By: Daniel Fore Drew Hutchison CH1211-11 Yulin Wang 12:30pm - 03:20pm Tuesday October 09, 2007

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Data and Calculations: Identification of a Compound by Mass Relationships Atomic masses: Na 22.99 K 39.102 H 1.01 C 13.01 O 16 Cl 35.4 5 Molar masses: NaHCO3 84.01 Na2CO3 105.99 NaCl 58.44 KHCO3 100.122 K2CO3 138.214 KCl 74.552 Mass of crucible and cover plus unknown 104.290 Mass of crucible and cover 103.290 Mass of unknown 1.000 Mass of crucible, cover, and unknown after heating 103.967 Mass of carbonate after heating .672 Loss of mass of sample .328 % of loss 32.8 Sample is a
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Unformatted text preview: carbonate hydrogen carbonate Mass of crucible, cover, and solid chloride 103.987 Mass of solid chloride .697 Change in mass when original compound was converted to a chloride .303 Change divided by mass of original compound = Q = .303 Theoretical values of Q Possible sodium compound NaHCO3 Possible potassium compound KHCO 3 1 mole of compound -> 1 mole NaCl 1 mole of compound -> 1 mole KCl 84.01g of compound -> 58.44g NaCl 100.122g of compound -> 74.552g KCl Change in mass 25.57g Q=.304 Change in mass 25.57g Q= .255 Identity of unknown NaHCO3 Unknown No. C...
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Experiment 4 - carbonate hydrogen carbonate Mass of...

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