The reaction between pyrolusite and hydrochloric acid yields manganese chloride and chlorine gas … This is the fate of coloured molecules when they meet hypochlorite bleach. And not only coloured, b…

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Chlorine bleach is a solution of sodium hypochlorite and water. Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach. This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of hypochlorous acid.

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In an "inattentive moment" she added fresh bleach to what she thought was the bleach soaking tub; unfortunately the tub did not contain bleach but contained 5% hydrochloric acid. The acid solution (with bleach) immediately turned from clear to yellow.

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Bleach is an alkaline solution of a chemical called sodium hypochlorite, which acts as a base. It can also act as an oxidizing agent, and when it comes in contact with hydrochloric acid, it oxidizes the acid to form chlorine gas.

Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. The primary toxic chemical formed by the reaction is chloramine vapor … NH3 = ammonia HCl = hydrochloric acid N…

Direct physical contact with hydrochloric acid causes the worst toxic reactions in humans. If inhaled, it can cause coughing and choking, and it may even burn the throat. If hydrochloric acid makes co…