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Percent Ca in unknown

Percent Ca in unknown

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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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