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Write a balanced equation, or give the half equations, for the displacement reaction that occurs between chlorine gas and an aqueous solution of sodium bromide. - Leaving Cert Chemistry - Question g - 2018

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Question g

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Write a balanced equation, or give the half equations, for the displacement reaction that occurs between chlorine gas and an aqueous solution of sodium bromide.

Worked Solution & Example Answer:Write a balanced equation, or give the half equations, for the displacement reaction that occurs between chlorine gas and an aqueous solution of sodium bromide. - Leaving Cert Chemistry - Question g - 2018

Step 1

Write the balanced equation

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Answer

The balanced equation for the displacement reaction between chlorine gas and aqueous sodium bromide is:

Cl2+2NaBr→2NaCl+Br2Cl_2 + 2NaBr \rightarrow 2NaCl + Br_2

Step 2

Write the half equations

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Answer

The half equations for the reaction can be written as:

  1. Oxidation half-reaction:

2Br−→Br2+2e−2Br^- \rightarrow Br_2 + 2e^-

  1. Reduction half-reaction:

Cl2+2e−→2Cl−Cl_2 + 2e^- \rightarrow 2Cl^-

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