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Complete and balance the equation for the chemical reaction that occurs when a piece of aluminium is placed in a solution of copper(II) ions: Cu$^{2+}$ + Al → - Leaving Cert Chemistry - Question i - 2011

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Complete-and-balance-the-equation-for-the-chemical-reaction-that-occurs-when-a-piece-of-aluminium-is-placed-in-a-solution-of-copper(II)-ions:--Cu$^{2+}$-+-Al-→-Leaving Cert Chemistry-Question i-2011.png

Complete and balance the equation for the chemical reaction that occurs when a piece of aluminium is placed in a solution of copper(II) ions: Cu$^{2+}$ + Al →

Worked Solution & Example Answer:Complete and balance the equation for the chemical reaction that occurs when a piece of aluminium is placed in a solution of copper(II) ions: Cu$^{2+}$ + Al → - Leaving Cert Chemistry - Question i - 2011

Step 1

Write the unbalanced equation

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Answer

The unbalanced equation can be represented as:

extCu2++extAl→ ext{Cu}^{2+} + ext{Al} →

Step 2

Balance the equation

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Answer

To balance the equation, we look for the stoichiometric coefficients. The balanced equation is:

3extCu2++2extAl→3extCu+2extAl3+3 ext{Cu}^{2+} + 2 ext{Al} → 3 ext{Cu} + 2 ext{Al}^{3+}

This indicates that three moles of copper(II) ions react with two moles of aluminum, producing three moles of copper and two moles of aluminum ions.

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