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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How do I fill out this chart
Reactions:
NaHCO3(s) + HCl(aq) → NaCl(s) + CO2(g) + H2O(l)
Na2CO3(s) + 2HCl(aq) → 2NaCl(s) + CO2(g) + H2O(l)

Transcribed Image Text:Calculation of percent composition of NaHCO3 and Na2cO33 in an unknown mixture
Result
0.5093
Mass of unknown mixture used (g)
Mass of NaCl formed (g)
Mass of NaHCO3 in unknown mixture (g)
Mass of NazCO3 in unknown mixture (g)
Percent of NaHCO3 by mass in unknown mixture (%)
Percent of Na,C03 by mass in unknown mixture (%)

Transcribed Image Text:Data
Unknown number
164
Mass data for reaction of NaHCO3/Na2CO3 mixture with HCI
Mass (g)
Crucible and cover
28.0524
Crucible, cover, and mbxture
28.5617
Crucible, cover, and residue after reaction with HCI: 1st weighing
28.5061
Crucible, cover, and residue after reaction with HCI: 2nd
weighing
28.5051
Crucible, cover, and residue after reaction with HCI: 3rd weighing
if necessary
N/A
Crucible, cover, and residue after reaction with HCI: 4th weighing
if necessary
N/A
Constant mass of crucible, cover, and mixture to be used in
calculations
28.5051
True percent NaHCO3 in unknown mixture (%)
(Provided by instructor)
49
True percent NazCO3 in unknown mixture (%)
(Provided by instructor)
51
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