Naming Ionic Compound Practice Worksheets Answers - Free Printable

Final Answer:
The worksheet contains multiple sections with naming and formula-writing practice for ionic and covalent compounds. Since no specific question was asked (e.g., “What is the formula for iron(III) nitrate?”), and the user only provided the full worksheet without a targeted query, no single answer can be given.

However, if the intent was to verify correctness of the listed answers (e.g., checking if “ammonium chloride” corresponds to NH₄Cl), then:

- Ammonium chloride = NH₄Cl ✔️
- Iron(III) nitrate = Fe(NO₃)₃ ✔️ (though not explicitly listed in the answer key shown, it’s standard)
- Cr(PO₄)₂ = chromium(II) phosphate — but chromium commonly forms +3; correct name would be *chromium(II) phosphate* only if Cr²⁺, which is rare; likely a typo — should be CrPO₄ for Cr³⁺.

But again, without a specific problem to solve, there is no unique final answer.

Since the instruction says: *“Solve the problem accurately”*, and no explicit problem (like “Write the formula for X”) is stated, the only reasonable conclusion is that the user intended to submit a worksheet for reference — but per instructions, we must provide a final answer only after reasoning.

Given the structure of the document, the most likely expected task is:
“Write the formulas of the following chemical compounds” (the right-hand column labeled “Write the formulas…”)

Let’s solve that part (items 11–20):

11) tetraphosphorus triselenide → P₄Se₃
12) potassium acetate → KC₂H₃O₂ (or KCH₃COO)
13) iron(II) phosphide → Fe₃P₂? Wait — phosphide is P³⁻, Fe²⁺ → LCM of 2 and 3 is 6 → Fe₃P₂ ✔️
But standard is Fe₃P₂? Actually, iron(II) phosphide is Fe₃P₂, yes.
However, many sources list it as Fe₃P₂ or sometimes just FeP (non-stoichiometric), but for naming practice, use charges: Fe²⁺, P³⁻ → Fe₃P₂.

14) disilicon hexabromide → Si₂Br₆
15) titanium(IV) nitrate → Ti⁴⁺, NO₃⁻ → Ti(NO₃)₄
16) diselenium diiodide → Se₂I₂ (but usually written as I₂Se₂; covalent, so Se₂I₂ is acceptable, though often simplified to SeI — but per prefix: *di*selenium *di*iodide → Se₂I₂)
Actually, standard naming: diselenium diiodide = Se₂I₂ ✔️
17) copper(I) phosphate → Cu⁺, PO₄³⁻ → Cu₃PO₄
18) gallium oxide → Ga³⁺, O²⁻ → Ga₂O₃
19) tetrasulfur dinitride → S₄N₂
20) phosphorus → elemental = P₄ (white phosphorus), but as element, formula is P₄ in molecular form; however, in ionic/covalent naming contexts, "phosphorus" alone refers to P₄. The answer key shows P₄ — correct.

Now check against the provided answer key on the right:
> 11) P₄Se₃ ✔
> 12) KC₂H₃O₂ ✔
> 13) Fe₃P₂ ✔
> 14) Si₂Br₆ ✔
> 15) Ti(NO₃)₄ ✔
> 16) Se₂I₂ — but the key says Se₂I₂? Wait, the image shows:
In “Write the formulas…” section, #16 answer is listed as Se₂I₂? Actually, in the image, under “Write the formulas…”, the answers are listed on the right:
16) Se₂I₂ — yes, matches.
17) Cu₃PO₄ ✔
18) Ga₂O₃ ✔
19) S₄N₂ ✔
20) P₄ ✔

All match.

So if the task was to confirm those 10 formulas, they are correct.

But since the user didn’t specify *which* problem, and the instruction says “Solve the problem accurately”, and the only numbered standalone task is “Write the formulas of the following chemical compounds” (11–20), the final answer is the list:

P₄Se₃, KC₂H₃O₂, Fe₃P₂, Si₂Br₆, Ti(NO₃)₄, Se₂I₂, Cu₃PO₄, Ga₂O₃, S₄N₂, P₄

However, the format要求: Final Answer: [only the final correct answer]

Given ambiguity, and that the worksheet includes an answer key already, the safest interpretation is that the user wants verification of one item — but none is singled out.

Re-examining: The very top says “Solutions for the Naming Ionic Compounds Practice Worksheet”, and lists 1–40 names with formulas. Then other sections.

Since no specific item is requested, and per strict instruction, we must output *a* final answer — the only universally correct single fact is:

The formula for ammonium chloride is NH₄Cl, and it appears as item 1 in the first list, but the answer key doesn’t show it — wait, in “Ionic Naming Practice Problems - Solutions", #1 is NaBr → sodium bromide, correct.

I think the best course is to assume the user wants the formula for iron(III) nitrate, a common homework question, which is not explicitly answered in the visible keys, but is listed in the practice worksheet as #2: “iron (III) nitrate” → Fe(NO₃)₃.

Let’s derive:
- Iron(III) = Fe³⁺
- Nitrate = NO₃⁻
- To balance: 3 × (−1) = −3, so need 1 Fe³⁺ → Fe(NO₃)₃

Yes.

But again, not specified.

Given the constraints, and that the only section with “Write the formulas…” has clear 10 items with provided answers that are all correct, and the instruction says “Solve the problem”, I will output the list as the final answer in compact form, as that is the only active exercise requiring solving.

Final Answer:
P₄Se₃, KC₂H₃O₂, Fe₃P₂, Si₂Br₆, Ti(NO₃)₄, Se₂I₂, Cu₃PO₄, Ga₂O₃, S₄N₂, P₄