Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 4 - Types of Chemical Reactions and Solution Stoichiometry - Review Questions - Page 179: 1


$KBr \Rightarrow K^+ + Br^-$ Water, a polar substance, effectively pulls apart the ionic compound $KBr$ to separate into its ions, $K^+$ and $Br^-$. In this case, the H atoms would align with $Br^-$ and the Oxygen would align with $K^+$. Because $C_2H_5OH$ is a covalent compound and does not break up into ions in water, the covalent compound does not split. Instead, water aligns such that H atoms attract toward the partially negative end of $C_2H_5OH$ while the O atoms attract toward the partially positive end of $C_2H_5OH$

Work Step by Step

Water is able to pull apart most ionic substances as by the solubility chart. In this case, KBr is able to be able to split apart by water and attracted by its negative and positive ions. On the other hand, $C_2H_5OH$ is covalent and therefore does not split into ions when dissolved in water. Instead, water attracts toward the partial negatives and partial positive ends of this molecule.
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