23. Chemistry of the Nonmetals

Step 1: 2 H₂S (g) + 3 O₂ (g) → 2 SO₂ (g) + 2 H₂O (g)
Step 2: 2 H₂S (g) + 3 O₂ (g) → 2 SO₂ (g) + 2 H₂O (g)

Determine the number of electrons transferred in step one of the Claus process.

K₂O₂    CaO    CsO₂

Classify each of the following compounds as an oxide, peroxide, or superoxide.

i) Li₂O          _____________________

ii) RbO₂       _____________________

iii) BaO₂      _____________________

iv) SrO        _____________________

Write a balanced equation for the reaction of potassium with oxygen.

Arrange the following oxides in order of increasing basic character: Al2O3, Cs2O, K2O, N2O5.

Which of the following oxides will be more soluble in acidic solution? (LO 22.14)

(a) SiO2 (b) NO2

(c) BaO (d) B2O3

In the following pictures of oxides, red spheres represent O atoms or ions, and green spheres represent atoms or ions of a second- or third-row element in its highest oxidation state.

(1) <IMAGE>

(2) <IMAGE>

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(b) Identify each oxide as ionic or covalent.

Look at the location of elements A, B, C, and D in the following periodic table:

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(a) Write the formula of the oxide that has each of these elements in its highest oxidation state.

The following models represent the structures of binary

oxides of second- and third-row elements in their highest

oxidation states:

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(a) Identify the non-oxygen atom in each case, and write the molecular formula for each oxide.

Write chemical equations for the reaction of calcium with the following substances, making sure that the numbers and kinds of atoms are the same on both sides of the equations. If no reaction occurs, write N.R.

(d) O₂

Look at the location of elements A, B, C, and D in the following periodic table:

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(b) Classify each oxide as basic, acidic, or amphoteric.

Chlorine reacts with molten sulfur to yield disulfur dichloride, a yellowish-red liquid. Propose a structure for disulfur dichloride.