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A colorless crystalline compound when dissolved in water förmed a colorless solution. This compound was heated in a clean, dry test tube. This heating produced several drop- lets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow-brown solution.

A colorless crystalline compound when dissolved in water förmed a colorless solution. This compound was heated in a clean, dry test tube. This heating produced several drop- lets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow-brown solution.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.199QP
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2A colorless crystalline compound when dissolved in water formed a colorlesS solution This compound was heated in a clean, dry test tube. This heating produced several drop- lets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow-brown solution. a. Determine if this colorless crystalline compound is a true hydrate or not. b. Give reasons. 3. A student heated an unknown hydrate, Na,SO4•XH,O, in a crucible. The water was driven off, leaving the anhydrous salt in the crucible. After cooling, the mass of the anhydrous salt and water lost was calculated. The mass of the anhydrous salt was 0.695 g and the mass of water lost was 0.895 g. Calculate the moles of anhydrous salt in the sample. Show all steps. (The molar mass of this salt is 142.04 g.) a. 45
Transcribed Image Text:2A colorless crystalline compound when dissolved in water formed a colorlesS solution This compound was heated in a clean, dry test tube. This heating produced several drop- lets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow-brown solution. a. Determine if this colorless crystalline compound is a true hydrate or not. b. Give reasons. 3. A student heated an unknown hydrate, Na,SO4•XH,O, in a crucible. The water was driven off, leaving the anhydrous salt in the crucible. After cooling, the mass of the anhydrous salt and water lost was calculated. The mass of the anhydrous salt was 0.695 g and the mass of water lost was 0.895 g. Calculate the moles of anhydrous salt in the sample. Show all steps. (The molar mass of this salt is 142.04 g.) a. 45
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