Yzed 3.725 g of an unknown mixture of NaCl, SiO2, and CaCO3. You isolated 1.108 g NaCl, 0.848 g SiO2, and 2.033 g CaCO3. Your TA later informs you that the original mixture was 25% NaCl, 25% SIO2, and 50% CaCO3- Choose a possible explanation for the discrepancy between your values and the actual percentages. O The CaCO3 was decanted into the SiO2 O NaCl was not completely dried before its mass was determined. D The SiO2 solution was cooled to room temperature and then weighed. O CaCl2 is a desiccant and therefore absorbed water before K2CO3 was added.

Yzed 3.725 g of an unknown mixture of NaCl, SiO2, and CaCO3. You isolated 1.108 g NaCl, 0.848 g SiO2, and 2.033 g CaCO3. Your TA later informs you that the original mixture was 25% NaCl, 25% SIO2, and 50% CaCO3- Choose a possible explanation for the discrepancy between your values and the actual percentages. O The CaCO3 was decanted into the SiO2 O NaCl was not completely dried before its mass was determined. D The SiO2 solution was cooled to room temperature and then weighed. O CaCl2 is a desiccant and therefore absorbed water before K2CO3 was added.

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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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.

Question

You analyzed 3.725 g of an unknown mixture of NaCI, SiO2, and CaCO3. You
isolated 1.108 g NaCl, 0.848 g SiO2, and 2.033 g CaCO3. Your TA later informs
you that the original mixture was 25% NaCl, 25% SiO2, and 50% CaCO3.
Choose a possible explanation for the discrepancy between your values and the
actual percentages.
O The CACO3 was decanted into the SIO2
O NaCl was not completely dried before its mass was determined.
O The SiO2 solution was cooled to room temperature and then weighed.
O CaCl2 is a desiccant and therefore absorbed water before K2CO3 was added.
O CaCO3 did not completely react with HCI. As a result, less CaC12 was produced
O CaCO3 is slightly soluble in water. Some of the CaCO3 dissolved during the NaCl
isolation step.

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