Tiêu đề Module 2.pdf ✅

GD Goenka Healthcare Academy Solutions Solution is a combination of solute and solvent. A solute dissolves in solvent and the preparation is called as solution. Solute + Solvent = Solution Basically Solutions are of two Types: 1. Saturated solution and 2. Standard solution. 1. Saturated solution: In the saturated solution neither weight of solute is not specified nor is the volume of solvent. Thus, any volume of solvent in which maximum amount of solute is dissolved is saturated solution. The strength of solution is not known here. 2. Standard solution: In the standard solution weight of solute and volume of solvent both are known. Thus, it is the preparation made from known volume of solvent and known weight of solute. The strength of solution can be determined here. Strength of solution can be expressed in four ways. 1. Percent solution 2. Part dilutions 3. Molar solution 4. Normal solution 1. Percent solution: This is the most common way of expressing strength of a solution. Percent implies a fixed amount of solute dissolved per hundred parts of final solution. It can be further divided as. a. Weight per unit weight (w/w): In this type weight of both solute and solvent add up to 100, regardless of final volume produced. b. Weight per unit volume (w/v): In this type both desired weight of solute is dissolved in a solvent to make final volume of 100 ml. c. Volume per unit volume (v/v): In this type both solute and solvent are liquids. Desired volume of solute is added in a solvent to make final volume of 100 ml. 2. Part dilutions: In this method the strength of dilution is expressed as that part of solute dissolved in one part of solvent. e.g. RBC dilution is 1:200 that means there is one part of blood in 200 part (by volume) of diluting fluid. 3. Molar solution: A molar solution contains the molecular weight of solute in grams per liter of solution e.g. The molecular weight of HCl is 36.5 hence one molar solution of acid contains 36.5 gm of HCl in one lit.