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Chapter 2: Problem 38

Give the formulas of compounds in which (a) the cation is \(\mathrm{Ba}^{2+}\), the anion is \(\mathrm{I}^{-}\) or \(\mathrm{N}^{3-}\). (b) the anion is \(\mathrm{O}^{2-}\), the cation is \(\mathrm{Fe}^{2+}\) or \(\mathrm{Fe}^{3+}\)

Short Answer

Expert verified
a) Ba2+ with I- and N3- b) O2- with Fe2+ and Fe3+ Answer: The formulas of the compounds are: a) BaI2 and Ba3N2 b) FeO and Fe2O3

Step by step solution

01

Forming compounds with Ba2+

For the first compound, we have \(\mathrm{Ba}^{2+}\) as the cation and \(\mathrm{I}^{-}\) as the anion. In order to balance the charge, we need 2 iodide anions for each barium cation. Therefore, the formula for this compound is \(\mathrm{BaI}_{2}\). For the second compound, we have \(\mathrm{Ba}^{2+}\) as the cation and \(\mathrm{N}^{3-}\) as the anion. In order to balance the charge, we need 3 barium cations for every 2 nitride anions. Therefore, the formula for this compound is \(\mathrm{Ba}_{3}\mathrm{N}_{2}\).
02

Forming compounds with O2-

For the first compound, we have \(\mathrm{O}^{2-}\) as the anion and \(\mathrm{Fe}^{2+}\) as the cation. In order to balance the charge, we need one of each ion type. Therefore, the formula for this compound is \(\mathrm{FeO}\). For the second compound, we have \(\mathrm{O}^{2-}\) as the anion and \(\mathrm{Fe}^{3+}\) as the cation. In order to balance the charge, we need 2 oxide anions for each iron(III) cation. Therefore, the formula for this compound is \(\mathrm{Fe}_{2}\mathrm{O}_{3}\). In conclusion, the formulas of the compounds are: (a) \(\mathrm{BaI}_{2}\) and \(\mathrm{Ba}_{3}\mathrm{N}_{2}\) (b) \(\mathrm{FeO}\) and \(\mathrm{Fe}_{2}\mathrm{O}_{3}\)

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Most popular questions from this chapter

Classify the following compounds as electrolytes or non-electrolytes. (a) potassium chloride, KCl. (b) hydrogen peroxide, \(\mathrm{H}_{2} \mathrm{O}_{2}\). (c) methane, \(\mathrm{CH}_{4}\) (d) barium nitrate, \(\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}\).

Write the names of the following molecules. (a) \(\mathrm{ICl}_{3}\) (b) \(\mathrm{N}_{2} \mathrm{O}_{5}\) (c) \(\mathrm{PH}_{3}\) (d) \(\mathrm{CBr}_{4}\) (e) \(\mathrm{SO}_{3}\)

Write formulas for the following ionic compounds. (a) hydrochloric acid (b) sodium nitrite (c) chromium(III) sulfite (d) potassium chlorate (e) iron(III) perbromate

Write formulas for the following ionic compounds. (a) cobalt(II) acetate (b) barium oxide (c) aluminum sulfide (d) potassium permanganate (e) sodium hydrogen carbonate

A molecule of ethylamine is made up of two carbon atoms, seven hydrogen atoms, and one nitrogen atom. (a) Write its molecular formula. (b) The reactive group in ethylamine is \(\mathrm{NH}_{2}\). Write its condensed structural formula.
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