Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 18 - Problems: 18.85

Answer

See explanation below.

Work Step by Step

Variation of ACID STRENGTH with Atomic Size: In a Period, atomic size decreases from left to right. And in a group, Atomic size increases from top to bottom. Now, as atomic size increases, the bond length also increases, and thus Bond strength decreases. As a result, As E becomes larger, the Eā€”H bond becomes longer and weaker, so H+ comes off more easily. On the contrary, the smaller non-metals attract electrons more strongly in the polar bond by shifting the electron density away from H, thus making H_ more easily transferred to a water molecule to form H3O+.
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