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de aqueous solutions of t e as the solids (see ima

de aqueous solutions of t e as the solids (see ima

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter15: Complex Ion And Precipitation Equilibria
Section: Chapter Questions
Problem 68QAP
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A student was given two vials and each contained a chromium salt. The vial labeled CrCl,-6 H,0 contained a dark green solid and the one labeled Cr(NO,)3-9 H,0 contained a purple solid. She made aqueous solutions of these solids and the colors of these solutions were the same as the solids (see image below). Initial appearance of aqueous solutions (0.05 M) of Cr(NO3); 9 H,0O (left) and CrCl; 6 H,O (right) After preparing these solutions, she had to leave the lab and the solutions remained sitting on the bench for 24 hours. When she returned the next day, she found that the aqueous solution of CrCl, had changed color and was now purple like the solution containing Cr(NO3);'9 H,0 (see image below). Appearance of the same aqueous solutions (0.05 M) of Cr(NO3); 9 H,O (left) and CrCl;'6 H,O (right) after 24 hours Based upon this observation, please describe what happened in the solution. Write out reactions that describe the changes that took place in the CrCl3-6 H,O solution over the course of 24 hours.
Transcribed Image Text:A student was given two vials and each contained a chromium salt. The vial labeled CrCl,-6 H,0 contained a dark green solid and the one labeled Cr(NO,)3-9 H,0 contained a purple solid. She made aqueous solutions of these solids and the colors of these solutions were the same as the solids (see image below). Initial appearance of aqueous solutions (0.05 M) of Cr(NO3); 9 H,0O (left) and CrCl; 6 H,O (right) After preparing these solutions, she had to leave the lab and the solutions remained sitting on the bench for 24 hours. When she returned the next day, she found that the aqueous solution of CrCl, had changed color and was now purple like the solution containing Cr(NO3);'9 H,0 (see image below). Appearance of the same aqueous solutions (0.05 M) of Cr(NO3); 9 H,O (left) and CrCl;'6 H,O (right) after 24 hours Based upon this observation, please describe what happened in the solution. Write out reactions that describe the changes that took place in the CrCl3-6 H,O solution over the course of 24 hours.
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