Inorganic Ion Fundamentals

From the study guide

Inorganic Ions Revision Sheet

1. 📌 Essentials

  • Oxyanions are ions containing oxygen, with specific formulas and oxidation states.
  • Nitrogen ions: nitrite (NO₂⁻) and nitrate (NO₃⁻) are key in nitrogen cycling.
  • Sulfur ions: sulfite (SO₃²⁻), sulfate (SO₄²⁻), and thiosulfateS₂O₃²⁻) vary in oxidation states.
  • Phosphorus ions: phosphite (₃³⁻) and phosphate (PO₄³⁻) are vital in biological systems.
  • Halogen oxyanions: hypochlorite (ClO⁻), chlorite (ClO₂⁻), chlorate (ClO₃⁻), perchlorate (ClO₄⁻).
  • Chromium ions: chromate (CrO₄²⁻) and dichromate (Cr₂O₇²⁻) are strong oxidizers.
  • Common ions: acetate (CH₃COO⁻), permanganate (MnO₄⁻), ammonium (NH₄⁺), cyanide (CN⁻).
  • Acids: sulfuric, nitric, phosphoric, acetic acids are key in inorganic chemistry.

2. 🧩 Key Structures & Components

  • Oxyanions — contain oxygen atoms bonded to central element, with oxidation states varying.
  • Nitrogen family ions — NO₂⁻ (nitrite), NO₃⁻ (nitrate).
  • Sulfur family ions — SO₃²⁻ (sulfite), SO₄²⁻ (sulfate), S₂O₃²⁻ (thiosulfate).
  • Phosphorus ions — PO₃³⁻ (phosphite), PO₄³⁻ (phosphate).
  • Halogen oxyanions — ClO⁻, ClO₂⁻, ClO₃⁻, ClO₄⁻.
  • Chromium ions — CrO₄²⁻ (chromate), Cr₂O₇²⁻ (dichromate).
  • Other key ions — NH₄⁺ (ammonium), H₃O⁺ (hydronium), MnO₄⁻ (permanganate), CN⁻ (cyanide).

3. 🔬 Functions, Mechanisms & Relationships

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Practice quiz preview

1. Which ion is commonly used as a biological buffer in blood?

2. What is the oxidation state of chromium in dichromate (Cr₂O₇²⁻)?

3. Which of the following ions is a strong oxidizing agent commonly used in chemistry?

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Flashcard preview

Oxyanions — contain oxygen?

Yes, with specific formulas and oxidation states.

Nitrate vs Nitrite — difference?

Nitrate has three oxygens, nitrite has two.

Chromate — role?

Acts as an oxidizing agent in reactions.

Oxyanions — definition?

Ions with oxygen and a central element.

Nitrogen ions — main types?

Nitrite (NO₂⁻), Nitrate (NO₃⁻).

Sulfur ions — key forms?

Sulfite (SO₃²⁻), Sulfate (SO₄²⁻), Thiosulfate (S₂O₃²⁻).

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Frequently asked questions

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