Dissociation, Ionic Equations, and Spectator Ions

One important aspect about ionic compounds that differs from molecular compounds has to do with dissolving in a liquid, such as water

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What is the difference between ionic compounds and molecular compounds

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Molecular compounds when dissolving in water, the individual molecules drift apart from each other, while ionic compounds when dissolving in water, the ions physically separate from each other

Ionic compounds when dissolving in water, the individual molecules drift apart from each other, while molecular compounds when dissolving in water, the ions physically separate from each other

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When sodium chloride (NaCl) dissolves in water, which of the following statements are true?

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\[ \mathrm{NaCl{(s)} \xrightarrow[\text{}]{H_2O} Na^+{(aq)} + Cl^-{(aq)}} \]

The Na⁺ and Cl⁻ ions separate and move independently in solution

The process is called dissociation

The (aq) label means the ions are solid

The (aq) label indicates the ions are dissolved in water

The NaCl molecule stays intact without separating into ions

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The process of an ionic compound separating into ions when it dissolves

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Missing

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In the ion dissociation process, when ions separate, all the ions separate

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True

False

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The chemical equation that represents the dissociation of KBr is

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\(\ \text{KBrl}(\text{s}) \rightarrow \text{K}^{+}\text{(aq) } + \text{Brl}^-\text{(aq)} \)

\(\ \text{KBrl}(\text{s}) \rightarrow \text{K}^{-}\text{(aq) } + \text{Brl}^-\text{(aq)} \)

\(\ \text{KBrl}(\text{s}) \rightarrow \text{K}^{+}\text{(aq) } + \text{Brl}^+ \text{(aq)} \)

\(\ \text{KBrl}(\text{s}) \rightarrow \text{K}^{-}\text{(aq) } + \text{Brl}^+\text{(aq)} \)

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A chemical equation in which the dissolved ionic compounds are written as separated ions is called

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complete ionic equation

Net ionic equation

Molecular equation

Total ionic equation

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NaBr(s) dissociates in water to form:

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NaBr(aq)

Na⁺(aq) + Br⁻(aq)

Na²⁺(aq) + Br²⁻(aq)

Na(s) + Br₂(g)

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SrCl₂(s) dissociates in water to form:

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SrCl₂(aq)

Sr²⁺(aq) + 2Cl⁻(aq)

Sr⁺(aq) + Cl⁻(aq)

Sr²⁺(aq) + Cl₂(g)

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(NH₄)₃PO₄(s) dissociates in water to form:

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NH₄⁺ + PO₄³⁻

3NH₄⁺(aq) + PO₄³⁻(aq)

NH₄³⁺ + PO₄⁻

2NH₄⁺ + PO₄²⁻

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Fe(C₂H₃O₂)₃(s) dissociates in water to form:

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Fe²⁺(aq) + 2C₂H₃O₂⁻(aq)

Fe³⁺(aq) + 3C₂H₃O₂⁻(aq)

Fe⁺(aq) + acetate gas

Fe²⁺(aq) + acetate precipitate

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Which is the complete ionic equation for FeCl₂(aq) + AgNO₃(aq)?

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Fe²⁺ + 2Cl⁻ + Ag⁺ + NO₃⁻ → AgCl(s) + Fe²⁺ + 2NO₃⁻

Fe²⁺ + Cl₂ → FeCl₂

Ag⁺ + Cl⁻ → AgCl(s)

FeCl₂ + AgNO₃ → AgCl + Fe(NO₃)₂

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Which is the complete ionic equation for BaCl₂(aq) + Na₂SO₄(aq)?

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Ba²⁺ + SO₄²⁻ → BaSO₄(s)

Ba²⁺ + 2Cl⁻ + 2Na⁺ + SO₄²⁻ → BaSO₄(s) + 2Na⁺ + 2Cl⁻

BaCl₂ + Na₂SO₄ → 2NaCl

Ba²⁺ + SO₄²⁻ + 2Na⁺ + 2Cl⁻ → Ba²⁺ + SO₄²⁻ + Na₂Cl₂

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Which best describes the complete ionic equation for KCl(aq) + NaC₂H₃O₂(aq)?

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K⁺ + Cl⁻ → KCl(s)

Na⁺ + C₂H₃O₂⁻ → NaC₂H₃O₂(s)

All ions remain aqueous; no reaction occurs

K⁺ + C₂H₃O₂⁻ → KC₂H₃O₂(s)

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Which is the complete ionic equation for Fe₂(SO₄)₃(aq) + Sr(NO₃)₂(aq)?

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2Fe³⁺ + 3SO₄²⁻ + Sr²⁺ + 2NO₃⁻ → SrSO₄(s) + 2Fe³⁺ + 3NO₃⁻

Fe₂(SO₄)₃ + Sr(NO₃)₂ → Fe₂(NO₃)₃ + SrSO₄(s)

Fe³⁺ + Sr²⁺ → FeSr⁺

Sr²⁺ + SO₄²⁻ → SrSO₄(s)

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Which is the net ionic equation for FeCl₂(aq) + AgNO₃(aq)?

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Fe²⁺ + 2Cl⁻ + Ag⁺ → FeAgCl₂(s)

Ag⁺(aq) + Cl⁻(aq) → AgCl(s)

Fe²⁺ + NO₃⁻ → Fe(NO₃)₂

Fe²⁺ + Ag⁺ → Fe³⁺ + Ag(s)

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What is the net ionic equation for BaCl₂(aq) + Na₂SO₄(aq)?

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BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl

Ba²⁺(aq) + SO₄²⁻(aq) → BaSO₄(s)

Ba²⁺ + Cl⁻ → BaCl(s)

SO₄²⁻ + 2Na⁺ → Na₂SO₄(s)

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What is the net ionic equation for KCl(aq) + NaC₂H₃O₂(aq)?

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K⁺ + Cl⁻ → KCl(s)

K⁺ + C₂H₃O₂⁻ → KC₂H₃O₂(s)

No net ionic equation (all ions remain soluble)

Na⁺ + Cl⁻ → NaCl(s)

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What is the net ionic equation for Fe₂(SO₄)₃(aq) + Sr(NO₃)₂(aq)?

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Fe³⁺ + NO₃⁻ → Fe(NO₃)₃

Sr²⁺(aq) + SO₄²⁻(aq) → SrSO₄(s)

Fe³⁺ + Sr²⁺ → FeSr(s)

SO₄²⁻ + NO₃⁻ → NO₃SO₄(s)

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Which ions are spectator ions in questions 9 and 10? (Select all that apply)

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Fe²⁺

NO₃⁻

Na⁺

Cl⁻

Ag⁺

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Which ions are spectator ions in questions 11 and 12? (Select all that apply)

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K⁺

Cl⁻

Fe³⁺

NO₃⁻

Sr²⁺

SO₄²⁻

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Year 9

What is the difference between ionic compounds and molecular compounds

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Explanation

When sodium chloride (NaCl) dissolves in water, which of the following statements are true?

Correct Answer

Explanation

The process of an ionic compound separating into ions when it dissolves

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Explanation

In the ion dissociation process, when ions separate, all the ions separate

Correct Answer

Explanation

The chemical equation that represents the dissociation of KBr is

Correct Answer

Explanation

A chemical equation in which the dissolved ionic compounds are written as separated ions is called

Correct Answer

Explanation

NaBr(s) dissociates in water to form:

Correct Answer

Explanation

SrCl₂(s) dissociates in water to form:

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Explanation

(NH₄)₃PO₄(s) dissociates in water to form:

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Explanation

Fe(C₂H₃O₂)₃(s) dissociates in water to form:

Correct Answer

Explanation

Which is the complete ionic equation for FeCl₂(aq) + AgNO₃(aq)?

Correct Answer

Explanation

Which is the complete ionic equation for BaCl₂(aq) + Na₂SO₄(aq)?

Correct Answer

Explanation

Which best describes the complete ionic equation for KCl(aq) + NaC₂H₃O₂(aq)?

Correct Answer

Explanation

Which is the complete ionic equation for Fe₂(SO₄)₃(aq) + Sr(NO₃)₂(aq)?

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Explanation

Which is the net ionic equation for FeCl₂(aq) + AgNO₃(aq)?

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Explanation

What is the net ionic equation for BaCl₂(aq) + Na₂SO₄(aq)?

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Explanation

What is the net ionic equation for KCl(aq) + NaC₂H₃O₂(aq)?

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Explanation

What is the net ionic equation for Fe₂(SO₄)₃(aq) + Sr(NO₃)₂(aq)?

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Explanation

Which ions are spectator ions in questions 9 and 10? (Select all that apply)

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Explanation

Which ions are spectator ions in questions 11 and 12? (Select all that apply)

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Explanation

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