Question

On adding an aqueous solution of sodium hydroxide to an aqueous solution of copper sulphate, copper hydroxide is precipitated and sodium remain in solution.
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Write its equation and then balance it.

Answer 1

Answer:

On adding an aqueous solution of sodium hydroxide to an aqueous solution of copper sulphate, copper hydroxide is precipitated and sodium remain in solution.

Answer 2

Answer:

The balanced chemical equation is $2NaOH(aq) + CuSO_{4} - > Cu(OH)_{2} + Na_{2} SO_{4} (aq)$

Explanation:

When sodium hydroxide solution is added to copper sulphate solution, a blue precipitate of copper hydroxide is formed along with sodium sulphate solution.

$2NaOH(aq) + CuSO_{4} - > Cu(OH)_{2} + Na_{2} SO_{4} (aq)$

The above reaction undergoes Chemical double displacement reaction.

Double displacement reaction:

• Chemical reactions known as double displacement reactions occur when the reactant ions move around to create new products.
• Precipitate production  happens as a result of a double displacement process.
• Covalent or ionic chemical bonds may be present between the reactants.
• In a chemical reaction each compound are interchanged to form two new compounds (AB+CD=AD+CB), so the reaction is a double displacement reaction.

As a result of Pale blue precipitate of $Cu(OH)_{2}$ is formed.

Final answer:

The balanced chemical equation is -*+$2NaOH(aq) + CuSO_{4} - > Cu(OH)_{2} + Na_{2} SO_{4} (aq)$

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