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Chapter 3: Problem 48

Predict the empirical formulas of the ionic compounds formed from the following pairs of elements. Name each compound. a. Al and Cl b. Na and O c. Sr and F d. Ca and Se

Short Answer

Expert verified
a. AlCl₃ - Aluminium chloride b. Na₂O - Sodium oxide c. SrF₂ - Strontium fluoride d. CaSe - Calcium selenide

Step by step solution

01

a. Al and Cl

1. Determine the charges of the ions: Aluminium (Al) forms a +3 ion, while chlorine (Cl) forms a -1 ion. 2. Balance the charges: To obtain a neutral compound, we require 3 Cl ions for each Al ion. This gives us the empirical formula: AlCl₃ 3. Name the compound: The compound is named using the names of the two ions: Aluminium chloride.
02

b. Na and O

1. Determine the charges of the ions: Sodium (Na) forms a +1 ion, while oxygen (O) forms a -2 ion. 2. Balance the charges: To obtain a neutral compound, we require 2 Na ions for each O ion. This gives us the empirical formula: Na₂O 3. Name the compound: The compound is named using the names of the two ions: Sodium oxide.
03

c. Sr and F

1. Determine the charges of the ions: Strontium (Sr) forms a +2 ion, while fluorine (F) forms a -1 ion. 2. Balance the charges: To obtain a neutral compound, we require 2 F ions for each Sr ion. This gives us the empirical formula: SrF₂ 3. Name the compound: The compound is named using the names of the two ions: Strontium fluoride.
04

d. Ca and Se

1. Determine the charges of the ions: Calcium (Ca) forms a +2 ion, while selenium (Se) forms a -2 ion. 2. Balance the charges: To obtain a neutral compound, one Ca ion combines with one Se ion. This gives us the empirical formula: CaSe 3. Name the compound: The compound is named using the names of the two ions: Calcium selenide.

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Most popular questions from this chapter

What noble gas has the same electron configuration as each of the ions in the following compounds? a. cesium sulfide b. strontium fluoride c. calcium nitride d. aluminum bromide

Consider the following reaction: $$ \mathrm{A}_{2}+\mathrm{B}_{2} \longrightarrow 2 \mathrm{AB} \quad \Delta E=-285 \mathrm{kJ} $$ The bond energy for \(A_{2}\) is one-half the amount of the AB bond energy. The bond energy of \(\mathbf{B}_{2}=432 \mathrm{kJ} / \mathrm{mol} .\) What is the bond energy of \(\mathrm{A}_{2} ?\)

The designations \(1 \mathrm{A}\) through \(8 \mathrm{A}\) used for certain families of the periodic table are helpful for predicting the charges on ions in binary ionic compounds. In these compounds, the metals generally take on a positive charge equal to the family number, while the nonmetals take on a negative charge equal to the family number minus \(8 .\) Thus the compound between sodium and chlorine contains \(\mathrm{Na}^{+}\) ions and \(\mathrm{Cl}^{-}\) ions and has the formula NaCl. Predict the formula and the name of the binary compound formed from the following pairs of elements. a. Ca and N b. \(K\) and 0 c. \(\mathrm{Rb}\) and \(\mathrm{F}\) d. \(\mathrm{Mg}\) and \(\mathrm{S}\) e. Ba and I f. Al and Se g. Cs and \(P\) h. In and Br

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