Here's why:
* Chlorine is a strong oxidizing agent: It readily accepts electrons from other substances, causing them to be oxidized.
* Acids are often sources of hydrogen ions (H+): These ions can be easily oxidized by chlorine.
Depending on the specific acid, the reaction could produce:
* Chlorine oxides: These are highly unstable and potentially explosive compounds.
* Hydrogen chloride (HCl): A highly corrosive gas.
* Other toxic or corrosive byproducts: The exact products depend on the acid used.
Therefore, mixing acids with chlorine is extremely dangerous and should never be done.
If you are unsure about the safety of a chemical reaction, always consult a qualified chemist or refer to a reputable safety manual.