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Chemistry / Chemistry 9 / Chapter 8 / Problem 8.57

Chemistry | 9th Edition | ISBN: 9781133611097 | Authors: Steven S. Zumdahl, Susan A. Zumdahl

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Without using Fig. 8.3, predict which bond in each of the following groups will be the

Chapter 8, Problem 8.57

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QUESTION:

Without using Fig. 8.3, predict which bond in each of the following groups will be the most polar

a. \(\mathrm{C}-\mathrm{H}, \mathrm{Si}-\mathrm{H}, \mathrm{Sn}-\mathrm{H}\)
b. \(\mathrm{Al}-\mathrm{Br}, \mathrm{Ga}-\mathrm{Br}, \mathrm{In}-\mathrm{Br}, \mathrm{Tl}-\mathrm{Br}\)
c. \(\mathrm{C}-\mathrm{O} \text { or } \mathrm{Si}-\mathrm{O}\)
d. \(\mathrm{O}-\mathrm{F} \text { or } \mathrm{O}-\mathrm{Cl}\)

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QUESTION:

Without using Fig. 8.3, predict which bond in each of the following groups will be the most polar

a. \(\mathrm{C}-\mathrm{H}, \mathrm{Si}-\mathrm{H}, \mathrm{Sn}-\mathrm{H}\)
b. \(\mathrm{Al}-\mathrm{Br}, \mathrm{Ga}-\mathrm{Br}, \mathrm{In}-\mathrm{Br}, \mathrm{Tl}-\mathrm{Br}\)
c. \(\mathrm{C}-\mathrm{O} \text { or } \mathrm{Si}-\mathrm{O}\)
d. \(\mathrm{O}-\mathrm{F} \text { or } \mathrm{O}-\mathrm{Cl}\)

ANSWER:

Step 1 of 4

a) C - H , Si - H , Sn - H

In the given molecules the main elements are carbon , silicon and Tin. Among these elements, carbon has a smaller atomic size hence the nuclear attraction on bond pairs is greater than other two elements. This tends to greater polarity of the C - H bond.

Therefore, the C -H bond is the most polar.

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