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 Form 3 Chemistry Chlorine and Its Compounds Questions and Answers

The set up below was used to prepare hydrogen chloride gas and react it with iron powder. Study it and answer the questions that follow.
At the end of the reaction, the iron powder turned into a light green solid.
(a) Identify the light green solid.
(b) At the beginning of the experiment, the pH of the solution in container L was about 14. At the end, the pH was found to be 2. Explain.

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