Compare the limiting reactant and the excess reactant in a reaction

The limiting reactant is the substance of the reactants that runs out first. The excess reactant is the substance with the greater amount than necessary to react completely with the limiting reactant after a chemical reaction.

The chemical equations are written below.

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:

For the given options:

Option 1:  Sodium chloride and copper sulfate

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

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:

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:

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:

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:

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:

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.