Answered: The %purity of a powdered crude sample…

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter31: Immunochemistry

Section: Chapter Questions

Problem 31.72P

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Question

The %purity of a powdered crude sample of Na₂CO₃ containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO₂(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr.

What CASE does this experiment satisfy?

Case A
Case B
Case C
h = 0
Case A:
Case B:
Case C:
Pressure outside is
Pressure outside is
Pressure outside is
greater than the
equal to the
less than the
pressure inside
pressure inside
pressure inside

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