w306 Naming Ionic Compounds Worksheet | PDF - Free Printable

Let's solve the Naming Ionic Compounds Worksheet step by step. We'll name each ionic compound using standard naming rules for ionic compounds, including:

- Cations (positive ions): Metals (especially transition metals) may have variable charges, so we use Roman numerals in parentheses if needed.
- Anions (negative ions): Nonmetals end in "-ide". Polyatomic ions have specific names (e.g., sulfate, nitrate, etc.).
- Polyatomic ions: Recognize common ones like NO₃⁻ (nitrate), SO₄²⁻ (sulfate), PO₄³⁻ (phosphate), NH₄⁺ (ammonium), etc.

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1) TiSe

- Ti = Titanium
- Se = Selenium → selenide
- Ti is a transition metal with variable charge.
- Se has a -2 charge → Se²⁻
- So Ti must be +2 to balance → Ti²⁺
- Name: Titanium(II) selenide

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2) Cu₂O

- Cu = Copper
- O = Oxygen → oxide
- O²⁻ → two O atoms give -2 total charge
- Two Cu atoms must balance → each Cu is +1
- Cu⁺ is copper(I)
- Name: Copper(I) oxide

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3) V₃P₅

- V = Vanadium
- P = Phosphorus → phosphide
- P³⁻ → five P atoms = -15 total charge
- Three V atoms must balance → each V = +5
- V⁵⁺ → vanadium(V)
- Name: Vanadium(V) phosphide

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4) Co(ClO₃)₂

- Co = Cobalt
- ClO₃⁻ = chlorate ion
- Two ClO₃⁻ → -2 total charge
- So Co must be +2 → Co²⁺
- Cobalt(II) chlorate
- Name: Cobalt(II) chlorate

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5) Pb(SO₄)₂

- Pb = Lead
- SO₄²⁻ = sulfate
- Two SO₄²⁻ → -4 total charge
- So Pb must be +4 → Pb⁴⁺
- Lead(IV) sulfate
- Name: Lead(IV) sulfate

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6) CuCrO₄

- Cu = Copper
- CrO₄²⁻ = chromate ion
- Charge of CrO₄²⁻ = -2
- So Cu must be +2 → Cu²⁺
- Copper(II) chromate
- Name: Copper(II) chromate

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7) (NH₄)₃PO₄

- NH₄⁺ = ammonium
- PO₄³⁻ = phosphate
- Three ammonium ions (+3) balance one phosphate (-3)
- Name: Ammonium phosphate

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8) Cu(NO₂)₂

- Cu = Copper
- NO₂⁻ = nitrite ion
- Two NO₂⁻ → -2 total charge
- So Cu = +2 → Cu²⁺
- Copper(II) nitrite
- Name: Copper(II) nitrite

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9) KCN

- K = Potassium
- CN⁻ = cyanide ion
- Potassium always +1
- Name: Potassium cyanide

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10) Zn₃N₂

- Zn = Zinc
- N = Nitrogen → nitride
- N³⁻ → two N atoms = -6 total charge
- Three Zn atoms → each must be +2 → Zn²⁺
- Zinc always forms +2 ion → no Roman numeral needed
- Name: Zinc nitride

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11) NaMnO₄

- Na = Sodium
- MnO₄⁻ = permanganate ion
- Sodium is +1
- MnO₄⁻ is permanganate
- Name: Sodium permanganate

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12) Co₃(PO₄)₂

- Co = Cobalt
- PO₄³⁻ = phosphate
- Two PO₄³⁻ → -6 total charge
- Three Co atoms → each must be +2 → Co²⁺
- Cobalt(II) phosphate
- Name: Cobalt(II) phosphate

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13) Li₂O

- Li = Lithium
- O = Oxide
- Li⁺ and O²⁻ → two Li⁺ balance one O²⁻
- Name: Lithium oxide

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14) Fe(C₂H₃O₂)₃

- Fe = Iron
- C₂H₃O₂⁻ = acetate ion
- Three acetate ions → -3 total charge
- So Fe = +3 → Fe³⁺
- Iron(III) acetate
- Name: Iron(III) acetate

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15) Sr(OH)₂

- Sr = Strontium
- OH⁻ = hydroxide
- Two OH⁻ → -2 charge
- Sr²⁺ → strontium ion
- Strontium always +2
- Name: Strontium hydroxide

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16) Cd(NO₃)₂

- Cd = Cadmium
- NO₃⁻ = nitrate
- Two nitrates → -2 charge
- Cd²⁺ → cadmium ion (always +2)
- Name: Cadmium nitrate

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17) CuO

- Cu = Copper
- O = Oxide
- O²⁻ → Cu must be +2 → Cu²⁺
- Copper(II) oxide
- Name: Copper(II) oxide

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18) PbS

- Pb = Lead
- S = Sulfide (S²⁻)
- Pb must be +2 → Pb²⁺
- Lead(II) sulfide
- Name: Lead(II) sulfide

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19) Mn(ClO₂)₇

Wait — this formula seems incorrect. Let’s check:
- ClO₂⁻ = chlorite ion
- Mn(ClO₂)₇ → 7 × ClO₂⁻ = -7 charge
- So Mn must be +7 → Mn⁷⁺

But manganese does not commonly form +7 oxidation state in simple ionic compounds, and Mn(ClO₂)₇ is not a stable or known compound.

However, assuming it's hypothetical, we can still name it:
- Mn⁷⁺ → Manganese(VII)
- ClO₂⁻ = chlorite
- Name: Manganese(VII) chlorite

But wait — chlorite is ClO₂⁻, and Mn⁷⁺ would require seven chlorite ions, which is unusual.

Alternatively, perhaps there's a typo? But based on the formula given, we proceed.

✔ Manganese(VII) chlorite

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20) NH₄HSO₃

- NH₄⁺ = ammonium
- HSO₃⁻ = hydrogen sulfite (or bisulfite)
- This is an acid salt
- Name: Ammonium hydrogen sulfite

> Note: "Hydrogen sulfite" is also called "bisulfite", but IUPAC prefers "hydrogen sulfite".

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✔ Final Answers:

1) Titanium(II) selenide
2) Copper(I) oxide
3) Vanadium(V) phosphide
4) Cobalt(II) chlorate
5) Lead(IV) sulfate
6) Copper(II) chromate
7) Ammonium phosphate
8) Copper(II) nitrite
9) Potassium cyanide
10) Zinc nitride
11) Sodium permanganate
12) Cobalt(II) phosphate
13) Lithium oxide
14) Iron(III) acetate
15) Strontium hydroxide
16) Cadmium nitrate
17) Copper(II) oxide
18) Lead(II) sulfide
19) Manganese(VII) chlorite
20) Ammonium hydrogen sulfite

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