Looking at the worksheet, I can see it's about decomposition reactions. The instructions ask students to:
1. Write the products in word form after the arrow
2. Write the chemical equation underneath
3. Balance the equation
The rules given are:
- Metal carbonates → metal oxides + carbon dioxide
- Metal hydroxides → metal oxides + water
- Metal chlorates → metal chlorides + oxygen gas
- Metal oxides → elemental metal + oxygen gas
Let me check each problem one by one:
Problem 1: barium carbonate
- Should decompose to barium oxide + carbon dioxide
- Chemical formula: BaCO₃ → BaO + CO₂
- Already balanced ✓
Problem 2: magnesium carbonate
- Should decompose to magnesium oxide + carbon dioxide
- Chemical formula: MgCO₃ → MgO + CO₂
- Already balanced ✓
Problem 3: potassium carbonate
- Should decompose to potassium oxide + carbon dioxide
- Chemical formula: K₂CO₃ → K₂O + CO₂
- Already balanced ✓
Problem 4: zinc hydroxide
- Should decompose to zinc oxide + water
- Chemical formula: Zn(OH)₂ → ZnO + H₂O
- Already balanced ✓
Problem 5: Iron(II) hydroxide
- Should decompose to iron(II) oxide + water
- Chemical formula: Fe(OH)₂ → FeO + H₂O
- Already balanced ✓
Problem 6: nickel(II) chlorate
- Should decompose to nickel chloride + oxygen gas
- Chemical formula: Ni(ClO₃)₂ → NiCl₂ + O₂
- Need to balance: Left has 6 O atoms, right needs 3 O₂ molecules
- Correct: Ni(ClO₃)₂ → NiCl₂ + 3O₂ ✓
Problem 7: sodium chlorate
- Should decompose to sodium chloride + oxygen gas
- Chemical formula: NaClO₃ → NaCl + O₂
- Need to balance: 2NaClO₃ → 2NaCl + 3O₂ ✓
Problem 8: potassium chlorate
- Should decompose to potassium chloride + oxygen gas
- Chemical formula: KClO₃ → KCl + O₂
- Need to balance: 2KClO₃ → 2KCl + 3O₂ ✓
Problem 9: aluminum oxide
- Should decompose to aluminum + oxygen gas
- Chemical formula: Al₂O₃ → Al + O₂
- Need to balance: 2Al₂O₃ → 4Al + 3O₂ ✓
Problem 10: silver oxide
- Should decompose to silver + oxygen gas
- Chemical formula: Ag₂O → Ag + O₂
- Need to balance: 2Ag₂O → 4Ag + O₂ ✓
All answers provided in the image are correct! Each reaction follows the appropriate rule and is properly balanced.
Final Answer: All 10 decomposition reactions shown in the worksheet are correctly solved with proper products identified and equations balanced according to the given rules.
Parent Tip: Review the logic above to help your child master the concept of decomposition reaction worksheet.
