I can see this is a worksheet about naming chemical compounds and writing formulas. Let me work through each problem systematically to verify the answers shown.
Part 1: Naming Chemical Compounds (1-10)
Let me check each one:
1) NaBr - Sodium (Na⁺) + Bromide (Br⁻) =
sodium bromide ✓
2) Ca(C₂H₃O₂)₂ - Calcium (Ca²⁺) + Acetate (C₂H₃O₂⁻) =
calcium acetate ✓
3) P₂O₅ - Two phosphorus atoms + five oxygen atoms =
diphosphorus pentoxide ✓
4) Ti(SO₄)₂ - Titanium with sulfate (SO₄²⁻). Since there are 2 sulfates (total charge -4), titanium must be Ti⁴⁺ =
titanium(IV) sulfate ✓
5) FePO₄ - Iron with phosphate (PO³⁻). Since phosphate has -3 charge, iron must be Fe³⁺ =
iron(III) phosphate ✓
6) K₃N - Potassium (K⁺) × 3 + Nitrogen as nitride (N³⁻) =
potassium nitride ✓
7) SO₂ - One sulfur + two oxygen =
sulfur dioxide ✓
8) CuOH - Copper with hydroxide (OH). Since OH has -1 charge, copper must be Cu⁺ =
copper(I) hydroxide ✓
9) Zn(NO₂)₂ - Zinc (Zn²⁺) + Nitrite (NO₂⁻) × 2 =
zinc nitrite ✓
10) V₂S₃ - Vanadium with sulfide (S²⁻). Total negative charge = 3 × (-2) = -6. So total positive charge must be +6, meaning each vanadium is +3 =
vanadium(III) sulfide ✓
Part 2: Writing Formulas (11-20)
11) silicon dioxide - Si⁴⁺ + O²⁻ → need 2 oxygens for every silicon =
SiO₂ ✓
12) nickel(III) sulfide - Ni³⁺ + S²⁻ → need 2 Ni³⁺ (+6) and 3 S²⁻ (-6) =
Ni₂S₃ ✓
13) manganese(II) phosphate - Mn²⁺ + PO₄³⁻ → need 3 Mn²⁺ (+6) and 2 PO₄³⁻ (-6) =
Mn₃(PO₄)₂ ✓
14) silver acetate - Ag + C₂H₃O₂⁻ → 1:1 ratio =
AgC₂H₃O₂ ✓
15) diboron tetrabromide - "di" = 2 boron, "tetra" = 4 bromine =
B₂Br₄ ✓
16) magnesium sulfate heptahydrate - Mg²⁺ + SO₄²⁻ + 7 H₂O =
MgSO₄·7H₂O ✓
17) potassium carbonate - K⁺ + CO²⁻ → need 2 K⁺ for 1 CO₃²⁻ =
K₂CO₃ ✓
18) ammonium oxide - NH₄⁺ + O²⁻ → need 2 NH₄ for 1 O²⁻ =
(NH₄)₂O ✓
19) tin(IV) selenide - Sn⁴⁺ + Se²⁻ → need 1 Sn⁴⁺ and 2 Se²⁻ =
SnSe₂ ✓
20) carbon tetrachloride - "tetra" = 4 chlorine atoms =
CCl₄ ✓
All answers on the worksheet are correct!
Final Answer: All 20 answers shown on the worksheet are correct. The naming and formula writing follows proper chemical nomenclature rules for ionic compounds, covalent compounds, and hydrates.
Parent Tip: Review the logic above to help your child master the concept of naming inorganic compounds worksheet.
