Question

What is the formula for chlorine water?

Answer 1

Chlorine water:

• When chlorine is dissolved in water, chlorine water is formed. However, if this chlorine water is left to stand for an extended period of time, it begins to lose its yellow color.
• This is due to the production of hydrochloric acid ($\mathrm{HCl}$) and hypochlorous acid ($\mathrm{HOCl}$).

The reaction of chlorine water:

• This produced Hypochlorous acid is a very unstable compound that begins to break down and release nascent oxygen as soon as it occurs.
• The oxidizing property of chlorine is due to this nascent oxygen.
• For chlorinated water, the reaction is as follows.

$$\begin{gathered} {\mathrm{Cl}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to \mathrm{HOCl}\left(\mathrm{aq}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)+\left[\mathrm{O}\right] \\ \left(Chlorine\mathit{\right)}\mathit{}\mathit{}\mathit{}\mathit{\left(}water\mathit{\right)}(Hypochlorous(Hydrochloric(Nascent \\ acid)acid)oxygen) \end{gathered}$$

Formula of chlorine water:

• Chlorine water is the chlorine dissolved in water (${\mathrm{Cl}}_2+{\mathrm{H}}_2\mathrm{O}$)