Part A A major source of chlorine gas, Cl 2 , is the electrolysis of brine, whic

Question

Part A

A major source of chlorine gas, Cl2, is the electrolysis of brine, which is concentrated salt water, NaCl(aq). What other two products result from this electrolysis reaction?

Express your answers as chemical formulas separated by a comma.

Part B

Write the balanced chemical equation for the reaction above.

Express your answer as a chemical equation. Identify all of the phases in your answer.

Part C

What element is oxidized in the equation?
I2 + 2 Br- 2 I- + Br2

Express your answers as a chemical expression.

Part D

What element is reduced in the equation?
I2 + 2 Br- 2 I- + Br2

Express your answers as a chemical expression.

Explanation / Answer

Electrolysis of brine gives H2 at cathode and Cl2 at anode

The reactions are:-

2NaCl(aq) + 2H2O(l) ---------> 2Na+(aq) + H2(g) + Cl2(g) + 2OH-(g)

(c) an element which loses electrons is said to be oxidized.Thus, Br- is oxidized.

(d) an element which gains electrons is said to be reduced.Thus, I2 is reduced.

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