Expressing Concentration of Solutions: MOLALITY, MOLE FRACTION, % COMPOSITION & PPM | CBSE 12

Welcome to Class 12 Chemistry Chapter 2 – Solutions. In this lecture, we will study important methods of expressing concentration of solutions including Molality, Mole Fraction, Percentage Composition and Parts Per Million (PPM). These concepts are frequently asked in CBSE Board Exams, NEET and JEE examinations. 📚 Topics Covered ✔ Molality (m) ✔ Formula and Units of Molality ✔ Mole Fraction (X) ✔ Percentage Composition ✔ Parts Per Million (PPM) ✔ Numerical Problems ✔ NCERT-Based Concepts ✔ Exam-Oriented Questions Important Formulae Molality (m) m = Moles of Solute / Mass of Solvent (kg) Mole Fraction (XA) XA = Moles of Component A / Total Moles Percentage Composition = (Mass of Component / Total Mass of Solution) × 100 PPM = (Mass of Solute / Mass of Solution) × 10⁶ 🎯 Useful For: • CBSE Class 12 Chemistry • ISC Chemistry • NEET Preparation • JEE Main & Advanced • School & Board Examinations 📌 Previous Lecture: Molarity 📌 Next Lecture: Normality 🔔 Subscribe to Dr Kumar Classes Chemistry for complete Class 11 & 12 Chemistry, NEET and JEE preparation. #Molality #MoleFraction #PPM #Solutions #Class12Chemistry #NEET #JEE #CBSE