JL alt ctrl ins del NAME SECTION DATE POSTLABORATORY ASSIGNMENT "barium/calcium/magnesium" unknown solution and aqueous (NH4)2SO4 produced a white precipitate that gave a green flame test. After centrifuging and decanting, the addition of aqueous (NH4)2C2O4 produced a white precipitate that gave a brick-red flame test. After centrifuging and decanting, the addition of aqueous Na2HPO4 and NaOH gave no reaction. State the cation(s) confirmed present and absent in the unknown solution. Cation(s) present Cation(s) absent 2. A "barium/calcium/magnesium" unknown solution gave no reaction with aqueous (NH4)2SO4, or aqueous (NH4)2C2O4. Adding aqueous Na2HPO4 and NaOH gave a white precipitate. After dissolving the precipitate in HCI, and adding magnesium reagent, the solution gave a clear blue gel precipitate. State the cation(s) confirmed present and absent in the unknown solution. Cation(s) present Cation(s) absent

JL alt ctrl ins del NAME SECTION DATE POSTLABORATORY ASSIGNMENT "barium/calcium/magnesium" unknown solution and aqueous (NH4)2SO4 produced a white precipitate that gave a green flame test. After centrifuging and decanting, the addition of aqueous (NH4)2C2O4 produced a white precipitate that gave a brick-red flame test. After centrifuging and decanting, the addition of aqueous Na2HPO4 and NaOH gave no reaction. State the cation(s) confirmed present and absent in the unknown solution. Cation(s) present Cation(s) absent 2. A "barium/calcium/magnesium" unknown solution gave no reaction with aqueous (NH4)2SO4, or aqueous (NH4)2C2O4. Adding aqueous Na2HPO4 and NaOH gave a white precipitate. After dissolving the precipitate in HCI, and adding magnesium reagent, the solution gave a clear blue gel precipitate. State the cation(s) confirmed present and absent in the unknown solution. Cation(s) present Cation(s) absent

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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1. A “barium/calcium/magnesium" unknown solution and aqueous (NH4)2SO4 produced a white precipitate that gave a green flame test. After centrifuging and decanting, the addition of aqueous (NH4)2C204 produced a white precipitate that gave a brick-red flame test. After centrifuging and decanting, the addition of aqueous NazHPO4 and NaOH gave no reaction. State the cation(s) confirmed present and absent in the unknown solution. Cation(s) present Cation(s) absent
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