Question

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For Part 3: Double-Displacement Reactions: For each of the double-displacement reactions, describe what happened in each well, including the colors of any products that formed. If a chemical reaction occurred, write a balanced equation for it. Then using the A, B symbols, write a general equation for a double-displacement reaction. Here are the chemical formulas of the reactants for each reaction:
• sodium chloride – NaCl copper sulfate – CuSO4
• sodium hydroxide – NaOH copper sulfate – CuSO4
• sodium phosphate – Na2HPO4 copper sulfate – CuSO4
• sodium chloride – NaCl silver nitrate – AgNO3
• sodium hydroxide – NaOH silver nitrate – AgNO3
• sodium phosphate – Na2HPO4 silver nitrate – AgNO3

Answer 1

Answer: The chemical equations are written below.

Step-by-step explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

The general chemical equation for double displacement reaction follows:

`AB+CD\rightarrow CB+AD`

For the given options:

• Option 1: Sodium chloride and copper sulfate

The chemical equation for the reaction of sodium chloride and copper sulfate follows:

`2NaCl+CuSO_4\rightarrow Na_2SO_4+CuCl_2`

By Stoichiometry of the reaction:

2 moles of sodium chloride reacts with 1 mole of copper sulfate produces 1 mole of sodium sulfate and 1 mole of copper chloride.

• Option 2: Sodium hydroxide and copper sulfate

The chemical equation for the reaction of sodium hydroxide and copper sulfate follows:

`2NaOH+CuSO_4\rightarrow Na_2SO_4+Cu(OH)_2`

By Stoichiometry of the reaction:

2 moles of sodium hydroxide reacts with 1 mole of copper sulfate produces 1 mole of sodium sulfate and 1 mole of copper hydroxide.

• Option 3: Sodium hydrogen phosphate and copper sulfate

The chemical equation for the reaction of sodium hydrogen phosphate and copper sulfate follows:

`Na_2HPO_4+CuSO_4\rightarrow Na_2SO_4+CuHPO_4`

By Stoichiometry of the reaction:

1 mole of sodium hydrogen phosphate reacts with 1 mole of copper sulfate produces 1 mole of sodium sulfate and 1 mole of copper hydrogen phosphate.

• Option 4: Sodium chloride and silver nitrate

The chemical equation for the reaction of sodium chloride and silver nitrate follows:

`NaCl+AgNO_3\rightarrow NaNO_3+AgCl`

By Stoichiometry of the reaction:

1 mole of sodium chloride reacts with 1 mole of silver nitrate produces 1 mole of sodium nitrate and 1 mole of silver chloride.

• Option 5: Sodium hydroxide and silver nitrate

The chemical equation for the reaction of sodium hydroxide and silver nitrate follows:

`NaOH+AgNO_3\rightarrow NaNO_3+AgOH`

By Stoichiometry of the reaction:

1 mole of sodium hydroxide reacts with 1 mole of silver nitrate produces 1 mole of sodium nitrate and 1 mole of silver hydroxide.

• Option 6: Sodium hydrogen phosphate and silver nitrate

The chemical equation for the reaction of sodium hydrogen phosphate and silver nitrate follows:

`Na_2HPO_4+2AgNO_3\rightarrow 2NaNO_3+Ag_2HPO_4`

By Stoichiometry of the reaction:

1 mole of sodium hydrogen phosphate reacts with 2 moles of silver nitrate produces 2 moles of sodium nitrate and 1 mole of silver hydrogen phosphate.

Hence, the chemical equations are written above.

Answer 2

General equation for a double-displacement reaction:

AB + CD --> AC + BD

• sodium chloride – NaCl copper sulfate – CuSO₄

NaCl + CuSO₄ --> Na₂SO₄ + CuCl₂

The products formed are sodium sulfate and copper (II) chloride.

Copper (II) chloride forms a blue colored solution.

• sodium hydroxide – NaOH copper sulfate – CuSO₄

NaOH + CuSO₄ --> Na₂SO₄ + Cu(OH)₂

The products formed are sodium sulfate and copper (II) hydroxide.

Copper (II) hydroxide forms a blue colored solution.

• sodium phosphate – Na₂HPO₂ copper sulfate – CuSO₄

Na₂HPO₄ + CuSO₄ --> Na₂SO₄ + CuHPO₄

The products formed are sodium sulfate and copper (II) hydrogen phosphate.

Copper (II) hydrogen phosphate forms a blue colored solution.

• sodium chloride – NaCl silver nitrate – AgNO₃

NaCl + AgNO₃--> AgCl + NaNO₃

The products formed are silver chloride and sodium nitrate.

Silver chloride forms a white precipitate.

• sodium hydroxide – NaOH silver nitrate – AgNO₃

NaOH + AgNO₃ --> NaNO₃ + AgOH

The products formed are silver hydroxide and sodium nitrate.

Silver hydroxide forms a white precipitate.

• sodium phosphate – Na₂HPO₄ silver nitrate – AgNO₃

Na₂HPO₄ + AgNO₃ --> NaNO₃ + Ag₂HPO₄

The products formed are sodium nitrate and silver hydrogen phosphate.

Silver hydrogen phosphate forms a colorless solution.