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A 4.076 g sample of powder contains LiHCO3 and an unknown amount of unreactive salt. When it is decomposed it weighed 2.580 g. Calculate the % LiHCO3 in the unknown powder. 2 LIHCO3 (s) → Li₂CO3 (s)+ H₂CO3 (g) 4

A 4.076 g sample of powder contains LiHCO3 and an unknown amount of unreactive salt. When it is decomposed it weighed 2.580 g. Calculate the % LiHCO3 in the unknown powder. 2 LIHCO3 (s) → Li₂CO3 (s)+ H₂CO3 (g) 4

Chemistry
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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Laboratory Exercise: Determining the Percentage of LiHCO₃ in a Sample** **Objective:** To calculate the percentage of lithium hydrogen carbonate (LiHCO₃) in a powder sample containing LiHCO₃ and an unknown amount of unreactive salt. **Experimental Details:** - A sample of powder weighing 4.076 grams is analyzed. - The sample contains LiHCO₃ and an unreactive salt. - Upon decomposition, the sample weighs 2.580 grams. **Chemical Reaction:** \[ 2 \text{LiHCO}_3 \, (s) \rightarrow \text{Li}_2\text{CO}_3 \, (s) + \text{H}_2\text{CO}_3 \, (g) \] **Instructions:** 1. Determine the mass loss upon decomposition, which corresponds to the release of gas. 2. Calculate the percentage of LiHCO₃ in the sample based on the mass before and after decomposition. **Source:** Basic Chemistry Laboratory Manual, Page 79
Transcribed Image Text:**Laboratory Exercise: Determining the Percentage of LiHCO₃ in a Sample** **Objective:** To calculate the percentage of lithium hydrogen carbonate (LiHCO₃) in a powder sample containing LiHCO₃ and an unknown amount of unreactive salt. **Experimental Details:** - A sample of powder weighing 4.076 grams is analyzed. - The sample contains LiHCO₃ and an unreactive salt. - Upon decomposition, the sample weighs 2.580 grams. **Chemical Reaction:** \[ 2 \text{LiHCO}_3 \, (s) \rightarrow \text{Li}_2\text{CO}_3 \, (s) + \text{H}_2\text{CO}_3 \, (g) \] **Instructions:** 1. Determine the mass loss upon decomposition, which corresponds to the release of gas. 2. Calculate the percentage of LiHCO₃ in the sample based on the mass before and after decomposition. **Source:** Basic Chemistry Laboratory Manual, Page 79
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