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Percent Ca in unknown

Percent Ca in unknown

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter3: Composition Of Substances And Solutions
Section: Chapter Questions
Problem 72E: What mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of 1.19 g...
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Gravimetric determination of Calcium as CaC2O4·H2O: Determine the Percent Ca in Unknown for all four trials of the lab experiment. Mass of CaCO3 unknown in stock solution = 1.239 g

Below is the equilibrium equation from the said experiment (use if needed):

 

СаCОз (s) + 2н* (аq) Са2* (аq) + Hа0 () + СО2 (9) (1) Нeat (H-N)2CO (аq) + Hа0 () 2NH3 (aq) + CO2 (g) (2) 2NH3 (aq) + H2C,04 (аq) 2NĦ, Taq) + C204²° (aq) (3) Са2* (аq) + C20,2 (aq) + Hа0 () CaC204 H2O (s) (4)
Transcribed Image Text:СаCОз (s) + 2н* (аq) Са2* (аq) + Hа0 () + СО2 (9) (1) Нeat (H-N)2CO (аq) + Hа0 () 2NH3 (aq) + CO2 (g) (2) 2NH3 (aq) + H2C,04 (аq) 2NĦ, Taq) + C204²° (aq) (3) Са2* (аq) + C20,2 (aq) + Hа0 () CaC204 H2O (s) (4)
Mass of filter paper |0.101 0.12 0.0995 0.153 Mass of Buchner funnel 12.08 10.195 11.384 10.282 Mass of labeled watch glass 15.012 26.083 23.412 12.305 Total mass of equipment Total mass of precipitate and equipment Mass of precipitate 37.193 36.398 34.8955 22.74 38.931 37.613 36.4335 24.307 1.738 1.215 0.462 1.567 Percent Ca in unknown
Transcribed Image Text:Mass of filter paper |0.101 0.12 0.0995 0.153 Mass of Buchner funnel 12.08 10.195 11.384 10.282 Mass of labeled watch glass 15.012 26.083 23.412 12.305 Total mass of equipment Total mass of precipitate and equipment Mass of precipitate 37.193 36.398 34.8955 22.74 38.931 37.613 36.4335 24.307 1.738 1.215 0.462 1.567 Percent Ca in unknown
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