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Chapter 2: Problem 85

Elements in the same family often form oxyanions of the same general formula. The anions are named in a similar fashion. What are the names of the oxyanions of selenium and tellurium: $\mathrm{SeO}_{4}^{2-}, \mathrm{SeO}_{3}^{2-}, \mathrm{TeO}_{4}^{2-}, \mathrm{TeO}_{3}^{2-} ?$

Short Answer

Expert verified
The names of the given oxyanions are as follows: \(SeO_{4}^{2-}\) - selenate, \(SeO_{3}^{2-}\) - selenite, \(TeO_{4}^{2-}\) - tellurate, and \(TeO_{3}^{2-}\) - tellurite.

Step by step solution

01

Identify the rule for naming oxyanions

Naming of oxyanions is based on the number of oxygen atoms 'in the ion. Generally, if a central atom is bonded to three or four oxygens, the anion is named after the first element followed by the suffix "-ate". For example, SO₄²⁻ is called sulfate. Step 2:
02

Determine the oxyanions with '-ate' suffix

We have four oxyanions to name: SeO₄²⁻, SeO₃²⁻, TeO₄²⁻, and TeO₃²⁻. For each of the pairs of selenium-oxygen and tellurium-oxygen anions, one has four oxygens and one has three oxygens. We can use the "-ate" suffix for those with four oxygen atoms. Thus, SeO₄²⁻: selenate TeO₄²⁻: tellurate Step 3:
03

Determine the oxyanions with '-ite' suffix

For oxyanions that have one less oxygen atom compared to the '-ate' anions, we use the suffix "-ite". In our given list, the remaining two oxyanions fall under this category, namely SeO₃²⁻ and TeO₃²⁻. Thus, SeO₃²⁻: selenite TeO₃²⁻: tellurite Step 4:
04

Consolidate the oxyanion names

We now have the names for all the four given oxyanions: 1. SeO₄²⁻: selenate 2. SeO₃²⁻: selenite 3. TeO₄²⁻: tellurate 4. TeO₃²⁻: tellurite

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