Here are the balanced molecular, ionic, and net ionic equations for each problem.
1) Mg(NO₃)₂(aq.) + Na₂CrO₄(aq.) → MgCrO₄(s) + NaNO₃(aq.)
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Balanced Equation: Mg(NO)₂(aq.) + Na₂CrO₄(aq.) → MgCrO(s) + 2NaNO(aq.)
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Ionic: Mg²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CrO₄²⁻(aq) → MgCrO(s) + 2Na⁺(aq) + 2NO₃⁻(aq)
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Net Ionic: Mg²(aq) + CrO₄²⁻(aq) → MgCrO₄(s)
2) Na₃PO₄(aq.) + Ni(ClO₄)₂(s) → Ni(PO₄)₂(s) + NaClO₄(aq.)
*(Note: Since Ni(ClO₄)₂ is marked as a solid (s), it does not break apart into ions in the reactant side).*
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Balanced Equation: 2Na₃PO₄(aq.) + 3Ni(ClO₄)₂(s) → Ni₃(PO₄)₂(s) + 6NaClO₄(aq.)
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Ionic: 6Na⁺(aq) + 2PO₄³⁻(aq) + 3Ni(ClO₄)₂(s) → Ni₃(PO₄)₂(s) + 6Na⁺(aq) + 6ClO₄⁻(aq)
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Net Ionic: 2PO₄³⁻(aq) + 3Ni(ClO₄)₂(s) → Ni₃(PO₄)₂(s) + 6ClO₄⁻(aq)
3) AgNO₃(aq.) + MgI₂(aq.) → AgI(s) + Mg(NO₃)₂(aq.)
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Balanced Equation: 2AgNO₃(aq.) + MgI₂(aq.) → 2AgI(s) + Mg(NO₃)₂(aq.)
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Ionic: 2Ag⁺(aq) + 2NO₃⁻(aq) + Mg²⁺(aq) + 2I⁻(aq) → 2AgI(s) + Mg²⁺(aq) + 2NO₃⁻(aq)
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Net Ionic: 2Ag⁺(aq) + 2I⁻(aq) → 2AgI(s)
*(Simplified: Ag⁺(aq) + I⁻(aq) → AgI(s))*
4) Ca(OH)₂(aq.) + FeCl₃(aq.) → Fe(OH)₃(s) + CaCl₂(aq.)
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Balanced Equation: 3Ca(OH)₂(aq.) + 2FeCl₃(aq.) → 2Fe(OH)₃(s) + 3CaCl₂(aq.)
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Ionic: 3Ca²⁺(aq) + 6OH⁻(aq) + 2Fe³⁺(aq) + 6Cl⁻(aq) → 2Fe(OH)₃(s) + 3Ca²⁺(aq) + 6Cl⁻(aq)
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Net Ionic: 2Fe³⁺(aq) + 6OH(aq) → 2Fe(OH)₃(s)
*(Simplified: Fe³⁺(aq) + 3OH(aq) → Fe(OH)₃(s))*
5) RbF(aq.) + CuSO₄(aq.) → Rb₂SO₄(aq.) + CuF₂(aq.)
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Balanced Equation: 2RbF(aq.) + CuSO₄(aq.) → Rb₂SO₄(aq.) + CuF₂(aq.)
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Ionic: 2Rb(aq) + 2F(aq) + Cu²⁺(aq) + SO₄²⁻(aq) → 2Rb⁺(aq) + SO₄²⁻(aq) + Cu²⁺(aq) + 2F(aq)
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Net Ionic: No Reaction (All ions cancel out because all products are aqueous).
6) (NH₄)₂S(aq.) + Co(NO₃)₂(aq.) → CoS(s) + NH₄NO₃(aq.)
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Balanced Equation: (NH₄)₂S(aq.) + Co(NO₃)₂(aq.) → CoS(s) + 2NH₄NO₃(aq.)
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Ionic: 2NH⁺(aq) + S²(aq) + Co²⁺(aq) + 2NO₃⁻(aq) → CoS(s) + 2NH⁺(aq) + 2NO₃⁻(aq)
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Net Ionic: Co²⁺(aq) + S²⁻(aq) → CoS(s)
7) Na₃PO₄(aq.) + FeCl₃(aq.) → FePO₄(s) + NaCl(aq.)
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Balanced Equation: Na₃PO₄(aq.) + FeCl₃(aq.) → FePO₄(s) + 3NaCl(aq.)
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Ionic: 3Na(aq) + PO₄³⁻(aq) + Fe³⁺(aq) + 3Cl⁻(aq) → FePO₄(s) + 3Na(aq) + 3Cl⁻(aq)
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Net Ionic: Fe³⁺(aq) + PO₄³⁻(aq) → FePO₄(s)
8) AgNO₃(aq.) + HCl(aq.) → AgCl(s) + HNO₃(aq.)
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Balanced Equation: AgNO₃(aq.) + HCl(aq.) → AgCl(s) + HNO₃(aq.)
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Ionic: Ag⁺(aq) + NO₃⁻(aq) + H⁺(aq) + Cl⁻(aq) → AgCl(s) + H⁺(aq) + NO₃⁻(aq)
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Net Ionic: Ag⁺(aq) + Cl⁻(aq) → AgCl(s)
9) MgBr₂(aq.) + KOH(aq.) → Mg(OH)₂(s) + KBr(aq.)
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Balanced Equation: MgBr₂(aq.) + 2KOH(aq.) → Mg(OH)₂(s) + 2KBr(aq.)
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Ionic: Mg²⁺(aq) + 2Br⁻(aq) + 2K⁺(aq) + 2OH⁻(aq) → Mg(OH)₂(s) + 2K⁺(aq) + 2Br⁻(aq)
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Net Ionic: Mg²⁺(aq) + 2OH⁻(aq) → Mg(OH)₂(s)
10) AlCl₃(aq.) + K₃PO₄(aq.) → AlPO₄(s) + KCl(aq.)
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Balanced Equation: AlCl₃(aq.) + K₃PO₄(aq.) → AlPO₄(s) + 3KCl(aq.)
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Ionic: Al³⁺(aq) + 3Cl⁻(aq) + 3K⁺(aq) + PO₄³⁻(aq) → AlPO₄(s) + 3K⁺(aq) + 3Cl(aq)
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Net Ionic: Al³⁺(aq) + PO₄³(aq) → AlPO₄(s)
Parent Tip: Review the logic above to help your child master the concept of net ionic equations worksheets.
