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Science-Related Homework Help Chemistry Topic started by: sarah52309 on Feb 12, 2017



Title: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å ...
Post by: sarah52309 on Feb 12, 2017
In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (Li–F), 2.82 Å (Na-Cl), 3.30 Å (K–Br), and 3.67 Å (Rb–I), respectively.

1. Predict the cation–anion distance using the values of ionic radii given in Figure 7.7, on page 257 in the textbook.
2. Calculate the difference between the experimentally measured ion–ion distances and the ones predicted from Figure 7.7. Assuming we have an accuracy of 0.04 Å in the measurement, would you say that the two sets of ion–ion distances are the same or not? Why, or why not?
3. What estimates of the cation–anion distance would you obtain for these four compounds using bonding atomic radii? Are these estimates as accurate as the estimates using ionic radii? Explain your answer.


Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
Post by: bio_man on Feb 12, 2017
Hi Sarah

The solution is provided below.

Please provide feedback :o


Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
Post by: sarah52309 on Feb 13, 2017
Thank you, I actually understood that part. It is actually part 2 (the accuracy part) and 3 that I am stuck on. I appreciate your help!


Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
Post by: bio_man on Feb 13, 2017
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Post by: arrow2733 on Feb 1, 2019
Hi Sarah The solution is provided below. Please provide feedback :o

Thank you!


Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
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Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
Post by: sherrylynn921@aol.com on Mar 24, 2019
Hi Sarah The solution is provided below. Please provide feedback :o
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Title: Re: In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 ...
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