Muriatic acid is also known as? hydrochloric acid

Muriatic acid is also known as, hydrochloric acid, which is most famously found in the stomach juices of sharks, skates and rays. Muriatic acid is caustic but more diluted than the more concentrated form of hydrochloric acid. Muriatic acid is also found in swimming pool water that has been water-filtered to remove minerals. It's usually around 1% by weight and does not contain oxygen or hydrogen sulfide, unlike other acids such as hydrofluoric or nitric acids.

Properties of muriatic acid

1. It is soluble in water.

Muriatic acid is a strong acid and therefore dissolves in water.

2. It reacts with metals slowly.

Muriatic acid reacts slowly with metals because the metal has to be oxidized or to give up electrons in order to react. The metal is oxidized and produces hydrogen gas according to the reaction: metal + 4HCl → metal chloride + hydrogen (gas).

3. It reacts with metal oxides slowly.

Muriatic acid does not react rapidly with metal oxides such as copper oxide, zinc oxide, etc. to form metal chlorides and hydrogen.

Muriatic acid + CuO → CuCl + HCl + water

4. It reacts with a thick layer of oxide on the surface of a metal quickly.

Muriatic acid can react with a thick layer of oxide on the surface of a metal quickly to form metal chlorides and hydrogen gas. The reaction: metal + HCl → metal chloride + hydrogen + water.

5. It reacts with water vapour and steam to form water vapour and steam very rapidly at room temperature, according to the reaction: HCl + e^-→ HClO (g) + H₂(g) .

HClO (g)→ HCl(g) + O (l)+ e^-

6. It reacts with carbon dioxide to form CO and hydrogen very rapidly at room temperature according to the reaction: HCl + H₂O → HClO (g) + CO + H₂(g) .

HClO (g) + H₂O → HCl(g) + O (l)+ 2H₂(g)

7. It reacts with acids to form carbon dioxide and water very rapidly according to the reaction: acid + e^-→ acid chloride + e^-

acid chloride+ water

8. It reacts with chlorine to form hydrogen chloride and water according to the reaction: HCl + Cl₂ → HClO (g) + Cl₂(g) + H₂O

HClO (g) → HCl(g) + O (l)+ 2H₂(g)

Uses of muriatic acid

1. The hydrogen chloride gas produced by the reaction of muriatic acid with a metal is used to clean industrial vessels, thereby removing any toxic residue.

2. It reacts with certain salts of chlorine and bromine, producing hydrogen chloride in a similar way to hydrochloric acid, but more slowly. Therefore it is used for neutralizing the muriatic acid in pools to prevent damage if an electroplating plant or an aircraft engine production line is located nearby. The resulting water is then pumped away and treated before being released into local waters via a final water purification unit.

3. It is also used in the semiconductor industry to dissolve certain oxides, such as aluminium oxide, which are hard to remove normally by chemical means and can be removed by a high temperature sintering process.

4. The hydrogen chloride produced by the reaction of muriatic acid with certain types of metal ions is used in some industrial processes for dissolving gas-barrier layers.

5. The sodium chloride that is added to swimming pools for a salt content of 1% adds sodium chloride (NaCl) to the water, thus increasing its buoyancy, and so making it possible for swimmers to swim without getting their hair wet (unless they spray themselves with seasalt).

6. Muriatic acid is also known as, hydrochloric acid, is used in the semiconductor industry to remove photoresists by dissolving them in a bath of muriatic acid and oxygenated water.

7. Highway road cleaners in the 1960s used muriatic acid.

8. It is used in the bath of some electroplating plants to dissolve unwanted materials that have reacted with the metal during electroplating, such as hydrogen sulfide (HS), or it can be used to remove unwanted zinc from steel during galvanizing.

9. It is also used in some types of ovens to remove oxides from the surface, which benefits the oven's longevity, reducing corrosion by preventing rust formation on metallic surfaces such as steel pot lids or baking trays that are placed into a hot oven and exposed to elevated temperatures during baking processes like pizza or bread making.

Conclusion

Muriatic acid is also known as, hydrochloric acid, is a strong acid, which dissolves in water. Reaction with metals is slow because the metal has to be oxidized in order to react. Reaction with metal oxides is slow because the oxide layer on the surface reduces the reaction speed of the acid by forming a protective layer of oxide around it. It reacts with a thick layer of oxide on the surface of a metal quickly and also with water vapour and steam to form water vapour and steam very rapidly at room temperature. It reacts with carbon dioxide to form CO and hydrogen very rapidly at room temperature.