A Complete Guide to Lab Manual for Class 11 Chemistry NCERT
Lab Manual for Class 11 Chemistry NCERT
Chemistry is a fascinating subject that involves the study of matter and its interactions with other substances. It is also a practical subject that requires hands-on experience in the laboratory to understand the concepts and principles better. In this article, we will explore the lab manual for class 11 chemistry NCERT, which is a comprehensive guide for students to perform various experiments and activities in the chemistry lab.
Lab Manual For Class 11 Chemistry Ncert
Basic Laboratory Techniques
Before we dive into the specific experiments, let us first review some basic laboratory techniques that are essential for any chemistry student. These techniques include measuring mass and volume, using a burette and a pipette, preparing standard solutions, and performing titrations.
Measuring mass and volume
Mass is the amount of matter in an object, and volume is the amount of space occupied by an object. To measure mass, we use a balance, which compares the mass of an object with a known mass. To measure volume, we use a measuring cylinder, which has a graduated scale that indicates the volume of liquid in it.
Using a burette and a pipette
A burette is a long glass tube with a tap at the bottom and a scale on the side. It is used to deliver a precise volume of liquid from one container to another. A pipette is a slender glass tube with a bulb at one end and a narrow tip at the other. It is used to transfer a fixed volume of liquid from one container to another.
Preparing standard solutions
A standard solution is a solution whose concentration is known accurately. It is prepared by dissolving a known mass of solute in a known volume of solvent. The concentration of a standard solution can be expressed in different units, such as molarity (M), molality (m), normality (N), or percentage (%).
A titration is a technique that involves adding a standard solution to an unknown solution until a chemical reaction is complete. The point at which the reaction is complete is called the end point, which can be detected by using an indicator or a pH meter. The amount of standard solution added to reach the end point is called the titre value, which can be used to calculate the concentration or amount of substance in the unknown solution.