Are liquid chlorine and super-shock chlorine the same?

To shock a swimming pool one uses either calcium hypochlorite ($\ce{Ca(ClO)2}$), commonly sold from at least one major brand in pouches,


[![hth Super](https://i.stack.imgur.com/tkQQBm.png)](https://i.stack.imgur.com/tkQQBm.png)


or the more obscure "liquid chlorine".


[![liquid chlorine](https://i.stack.imgur.com/rrkSHm.png)](https://i.stack.imgur.com/rrkSHm.png)


I'm saying "obscure" because labels for liquid chlorine never list the compound.


But unlike the result of dissolving $\ce{Ca(ClO)2}$ in water, which results in, by definition, a bleached (white) color, liquid chlorine is, somewhat surprisingly, yellow.


Are liquid chlorine and super-shock chlorine the same?




Liquid chlorine is probably bleach, which is a solution of sodium hypochlorite $\ce{NaOCl}$. This substance is obtained by dissolving chlorine $\ce{Cl2}$ in a solution of sodium hydroxide $\ce{NaOH}$, according to $$\ce{Cl2 + 2 NaOH -> NaOCl + NaCl + H2O}$$ Chlorine is produced by adding an acid to this solution : the acid destroys $\ce{NaOH}$ and produced free chlorine $\ce{Cl2}$ by reversing the previous equation (which should be written as an equilibrium). Even weak acids like carbonic acid (and $\ce{CO2}$) can do the job. This is why the solution deserves to be called "liquid chlorine".


 2