November 29, 2023

Identification test for Magnesium hydroxide

Identification test for Magnesium hydroxide

One of the common methods to identify magnesium hydroxide is the precipitation reaction. The following is a procedure for identifying magnesium hydroxide using a precipitation reaction:


  • Magnesium hydroxide
  • Hydrochloric acid (HCl)
  • Ammonium chloride (NH4Cl)
  • Sodium hydroxide (NaOH)
  • Distilled water
  • Test tube
  • Dropper or pipette


  1. Prepare a dilute solution of magnesium hydroxide by adding a small amount of magnesium hydroxide to a test tube containing distilled water.
  2. Add a few drops of hydrochloric acid to the magnesium hydroxide solution. If the solution fizzes or produces bubbles, it indicates the presence of carbonate impurities. If the solution does not fizz, proceed to the next step.
  3. Add a few drops of ammonium chloride solution to the test tube containing the magnesium hydroxide solution.
  4. Add a few drops of sodium hydroxide solution to the test tube containing the magnesium hydroxide and ammonium chloride solution.
  5. Observe the reaction. If magnesium hydroxide is present, it will form a white precipitate. The precipitate may take a few seconds to form.
  6. Confirm the identity of the precipitate by filtering it and washing it with distilled water. Dry the precipitate and perform additional tests, such as flame tests or spectroscopy, to confirm the identity of the substance.

Note: It is important to use proper safety precautions when handling chemicals, including wearing gloves and eye protection, working in a well-ventilated area, and following proper disposal procedures for chemical waste.

First Year B Pharm Notes, Syllabus, Books, PDF Subjectwise/Topicwise

F Y B Pharm Sem-IS Y B Pharm Sem-II
BP101T Human Anatomy and Physiology I TheoryBP201T Human Anatomy and Physiology II – Theory
BP102T Pharmaceutical Analysis I TheoryBP202T Pharmaceutical Organic Chemistry I Theory
BP103T Pharmaceutics I TheoryBP203T Biochemistry – Theory
BP104T Pharmaceutical Inorganic Chemistry TheoryBP204T Pathophysiology – Theory
BP105T Communication skills TheoryBP205T Computer Applications in Pharmacy Theory
BP106RBT Remedial BiologyBP206T Environmental sciences – Theory
BP106RMT Remedial Mathematics TheoryBP207P Human Anatomy and Physiology II Practical
BP107P Human Anatomy and Physiology PracticalBP208P Pharmaceutical Organic Chemistry I Practical
BP108P Pharmaceutical Analysis I PracticalBP209P Biochemistry Practical
BP109P Pharmaceutics I PracticalBP210P Computer Applications in Pharmacy Practical
BP110P Pharmaceutical Inorganic Chemistry Practical
BP111P Communication skills Practical
BP112RBP Remedial Biology Practical

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