Write some instructions for a swimming pool attendent explaining why chlorine compounds are added to the pool!?

2 Answers

  • Anonymous
    8 years ago
    Favorite Answer

    Calcium Hypochlorite (Ca(ClO)2) or sometimes sodium hypochlorite (NaClO) is added to swimming pools, because it reacts with the H2O in the pool, following the equation:

    ClO- + H2O --(equilibrium)--> HOCl + OH- + Cl-

    *note: the calcium in Ca(ClO)2 is left out because it acts as a spectator ion*

    And from this reaction, the hypochlorous acid (HOCl) reacts further with the water, partially ionising in the water to make hydronium ions and more hypochlorite ions following the equation:

    HOCl + H2O ---(equilibrium)--> H3O(+) + OCl-

    These ions (hypochlorite and hydronium) are effective at killing disease-causing bacteria. Chlorine (Cl2) is a very volatile element and is actually more effective at killing bacteria, but it is also toxic and harmful to the eyes, nose, mouth and throat. This is why Chlorine-containing compounds are added to most pools instead of using the actual Chlorine gas. As long as the pH of the pool water is kept above 4 (which it will be considering pool water is around pH 7), there will be virtually no Chlorine gas produced, making this a safe, public friendly way to keep algae and bacteria from growing in pools.

    I hope this helps :)

    Source(s): Chemistry textbook
  • 8 years ago

    um to keep it clean? go google the use of chlorine and youll get your answer

    Source(s): MY BRAIN!
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