🧪 Limit Test of Sulphate (Inorganic Chemistry Practical – Semester 1)
🧪 Limit Test of Sulphate (Inorganic Chemistry Practical – Semester 1) A Complete Lab Manual Style Practical for Pharma Students 🌟 Why This Practical is Important? Limit Test of Sulphate is one of the most frequently asked practicals in: ✔ B.Pharm Semester 1 ✔ D.Pharm Practical ✔ Viva & Internal exams 🎯 Aim To determine whether the amount of sulphate impurity present in a given sample does not exceed the prescribed limit . 🧪 Principle (Easy Language) Sulphate ions react with Barium chloride in acidic medium to form a white precipitate of barium sulphate . 👉 The turbidity produced in the test solution is compared with that of the standard solution . ⚗️ Chemical Reaction S O 4 2 − + B a C l 2 → B a S O 4 ↓ ( W h i t e p r e c i p i t a t e ) SO_4^{2-} + BaCl_2 → BaSO_4 ↓ (White precipitate) S O 4 2 − + B a C l 2 → B a S O 4 ↓ ( Whi t e p rec i p i t a t e ) 🧰 Apparatus Required Nessler cylinders (2) Measuring cylinder Pipette Glass rod...