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Formula of the unknown iron fluoride hydrate

Formula of the unknown iron fluoride hydrate

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
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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please solve for question 2 using the data above the reslt table.

2. A student is working to find the formula for an iron fluoride hydrate. After following the same procedure as the in this lab, they collected the following data. Use their data to complete the results table below. Data Mass (g) Cooled crucible 29.986 Crucible + hydrate before heating 30.896 Crucible + anhydrous after heating 30.456 Filter paper 0.890 Watch glass 23.671 Watch glass, filter paper, and dried iron 24.789 Results Mass (g) Moles iron fluoride hydrate H2O(g) removed anhydrous iron fluoride iron fluoride Formula of the unknown iron fluoride hydrate
Transcribed Image Text:2. A student is working to find the formula for an iron fluoride hydrate. After following the same procedure as the in this lab, they collected the following data. Use their data to complete the results table below. Data Mass (g) Cooled crucible 29.986 Crucible + hydrate before heating 30.896 Crucible + anhydrous after heating 30.456 Filter paper 0.890 Watch glass 23.671 Watch glass, filter paper, and dried iron 24.789 Results Mass (g) Moles iron fluoride hydrate H2O(g) removed anhydrous iron fluoride iron fluoride Formula of the unknown iron fluoride hydrate
Expert Solution
Step 1

Mass of hydrate = (30.896 - 29.986) g

= 0.91 g

Mass of anhydrous salt = (30.456-29.986) g

= 0.47 g

Mass of water removed = Mass of hydrate - Mass of anhydrous

= (0.91-0.47) g

= 0.44 g

Now,

No of moles = Mass / Molar Mass

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I don't undertaand how you calculated the final ratio of H(2)O at the end of the explaination. How did you come to 6? 

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