Chapter 8: Problem 2
The ionic compound \(\mathrm{AB}\) is formed. The charges on the ions may be \(+1,-1 ;+2,-2 ;+3,-3 ;\) or even larger. What are the factors that determine the charge for an ion in an ionic compound?
Chapter 8: Problem 2
The ionic compound \(\mathrm{AB}\) is formed. The charges on the ions may be \(+1,-1 ;+2,-2 ;+3,-3 ;\) or even larger. What are the factors that determine the charge for an ion in an ionic compound?
All the tools & learning materials you need for study success - in one app.
Get started for freeUse the following data to estimate \(\Delta H_{\mathrm{f}}^{\circ}\) for potassium chloride. $$ \mathrm{K}(s)+\frac{1}{2} \mathrm{Cl}_{2}(g) \longrightarrow \mathrm{KCl}(s) $$ $$ \begin{array}{lr} \text { Lattice energy } & -690 . \mathrm{kJ} / \mathrm{mol} \\ \text { Ionization energy for } \mathrm{K} & 419 \mathrm{~kJ} / \mathrm{mol} \\\ \text { Electron affinity of Cl } & -349 \mathrm{~kJ} / \mathrm{mol} \\ \text { Bond energy of } \mathrm{Cl}_{2} & 239 \mathrm{~kJ} / \mathrm{mol} \\ \text { Enthalpy of sublimation for } \mathrm{K} & 64 \mathrm{~kJ} / \mathrm{mol} \end{array} $$
One type of exception to the octet rule are compounds with central atoms having fewer than eight electrons around them. \(\mathrm{BeH}_{2}\) and \(\mathrm{BH}_{3}\) are examples of this type of exception. Draw the Lewis structures for \(\mathrm{BeH}_{2}\) and \(\mathrm{BH}_{3}\).
Write Lewis structures and predict the molecular structures of the following. (See Exercises 105 and 106 .) a. \(\mathrm{OCl}_{2}, \mathrm{KrF}_{2}, \mathrm{BeH}_{2}, \mathrm{SO}_{2}\) b. \(\mathrm{SO}_{3}, \mathrm{NF}_{3}, \mathrm{IF}_{3}\) c. \(\mathrm{CF}_{4}, \mathrm{SeF}_{4}, \mathrm{KrF}_{4}\) d. \(\mathrm{IF}_{5}, \mathrm{AsF}_{5}\) Which of these compounds are polar?
The second electron affinity values for both oxygen and sulfur are unfavorable (endothermic). Explain.
Some of the important properties of ionic compounds are as follows: i. low electrical conductivity as solids and high conductivity in solution or when molten ii. relatively high melting and boiling points iii. brittleness iv. solubility in polar solvents How does the concept of ionic bonding discussed in this chapter account for these properties?
What do you think about this solution?
We value your feedback to improve our textbook solutions.