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| Tests for Hydrochloric Acid |
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| For checking the presence of the hydrochloric acid, the following tests could be conducted: |
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| 1) It turns blue litmus paper red. |
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| 2) When silver nitrate solution is added to hydrochloric acid, it gives white precipitate of silver chloride. |
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| 3) The addition of lead nitrate solution to hydrochloric acid, gives a white precipitate of lead chloride. |
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| 4) When concentrated hydrochloric acid is added to oxidizing agents like manganese dioxide, lead dioxide, red lead, potassium permanganate or potassium dichromate, it liberates chlorine, a greenish yellow, pungent smelling gas. |
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Hydrogen Chloride and Hydrochloric Acid
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