File Name: principles of colloid and surface chemistry .zip
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- Class 12 Chemistry Revision Notes for Chapter 5 - Surface Chemistry
- Colloid and Surface Chemistry, Volume 12
- Intro to Colloid & Surface Chemistry
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Modern technology also takes assistance from surface chemistry in addition to drug delivery. In Class 12 chemistry Chapter 5 notes, we will provide students with extensive literature that will help them learn the concepts of surface chemistry in a much broader way. Given below, we have tried to explain each important topic required to be included in the ch 5 chemistry Class 12 notes.
First, we have different types of Catalyst, which help enhance the rate of a chemical reaction without getting itself consumed in the reaction. When entered into the chemical reaction, a catalyst will not undergo any change, and it can be recovered as it is. There are two types of Catalysts, and the first one is Homogenous catalysis, in which they are present in the same phase as that of reactants. On the other hand, when the Catalyst and the reactants don't have the same phase, the Catalyst is heterogeneous.
As we know by definition, the Catalyst is the substance that helps increase the rate of the chemical reaction without getting into the chemical reaction and changing itself. The process by which these substances increase the chemical reaction's rate is called catalysis. Let's see how they work, first.
For a reactant to react and give out a product, its molecules need to have threshold energy. In addition to this, the molecules which have this energy must be present in the above threshold value. The energy required to make the reaction going is called activation energy.
Molecules that have the required activation energy or above will convert themselves into product molecules. With the Catalyst's help, the chemist tries to alter the activation energy or, in some cases, make a different reaction mechanism that has the lower activation energy required to give out products. According to this theory, the Catalyst brings down the activation required for the chemical reaction to occur or allows it a different pathway to complete the reaction where the activation energy is low.
The Catalyst will make temporary bonds with the molecules of the reactants to form an intermediate complex. Now this intermediate complex will decompose in the reaction to give out the product. During the decomposition time, the Catalyst will again get back to its standard form, and no change will be observed in it. We already know in Class 12 Chemistry Chapter 5 notes that catalysts are a highly sufficient substance.
A pinch of it in the reaction can speed up its rate by a lot. As a result, students need to be aware of the Catalyst's properties, which they will use in the chemical reaction.
There are no such conditions that a student needs to keep in mind when using the Catalyst as it varies from substance to substance. The only thing they need to take care of is the amount they are using in the chemical reaction.
The adsorption theory in Surface Chemistry Class 12 notes suggests that the reactants which are present in the gaseous state or their dissolved state in any given solution get absorbed by the surface of the Catalyst, which is present in the solid-state.
With time as the concentration of the reactants keeps increasing on the surface, the availability, and probability of the reaction to take place between the two reactants increases, making the rate of reaction increases.
Also, when the reaction is taking place on the Catalyst's surface, some amount of energy will surely be released due to the nature of the reaction, which is exothermic. Thus, the heat will also provide a boost to the rate of the reaction. That's how a heterogeneous catalyst performs the catalysis in the reaction. These are all the topics that are covered in notes of surface chemistry Class Emulsifiers are the components that help in stabilizing the emulsion process by getting itself placed in between the phases of the reaction.
To find out what the emulsifiers do, we first need to know about the emulsion process, which is more of a dispersion made by the mixture of two immiscible liquids.
If we use a massive amount of force, these mixtures will mix up in each other, but they will again split up from one another with time. On the other hand, in the emulsion, the two liquids will remain the continuous phase, and the other liquid will be floating around that continuous phase in a separate droplet. The emulsifier can work as surface modifiers and sit on the surface of the droplets. Also, they work as a thickening agent by increasing the viscosity of the continuous phase in the emulsification.
Lastly, we can use emulsifiers as a weighting agent to determine the density of the various substances in the reaction. A colloidal solution is one of the three primary types of mixtures in which the other two substances will work as a solution and suspension.
The particles of the colloidal solution have a diameter ranging from 1 to nanometers. Still, they are evenly distributed in the solution. A substance can only be referred to as a colloidal solution if its molecules present in the dispersed phase are larger than the other molecules' size but still small enough to be not seen by the naked eye.
Colloids have Sol, Emulsion, Foam, and Aerosol. One of the best examples of the colloidal solution is the foam, which forms by the soap in which many gas particles get trapped inside the liquid or a solid substance. With the Tyndall effect, we can easily differentiate between colloidal vs. So these are the notes of Surface Chemistry Class 12 from Chapter 5.
We have provided all the information which you need for the revision of the individual topic. This chapter is also quite important in terms of theory as there are not many numerals for students to solve in this chapter. As a result, you can expect to get two or 5 marks questions from it, and these marks can be easily won if the students have prepared the chapter well by using the Vedantu's PDF notes.
Class 12 Chemistry Revision Notes for Chapter 5 - Surface Chemistry
Modern technology also takes assistance from surface chemistry in addition to drug delivery. In Class 12 chemistry Chapter 5 notes, we will provide students with extensive literature that will help them learn the concepts of surface chemistry in a much broader way. Given below, we have tried to explain each important topic required to be included in the ch 5 chemistry Class 12 notes. First, we have different types of Catalyst, which help enhance the rate of a chemical reaction without getting itself consumed in the reaction. When entered into the chemical reaction, a catalyst will not undergo any change, and it can be recovered as it is. There are two types of Catalysts, and the first one is Homogenous catalysis, in which they are present in the same phase as that of reactants. On the other hand, when the Catalyst and the reactants don't have the same phase, the Catalyst is heterogeneous.
Colloid and Surface Chemistry, Volume 12
Chapter headings. Selected papers. Introduction to the thermodynamics of the discontinuity surface in a single component system.
Intro to Colloid & Surface Chemistry
Faster previews. Personalized experience. Get started with a FREE account. Handbook of applied surface and colloid chemistry - Volume 1. Atkins De Paula Physical Chemistry 8th txtbk solman.
Colloid and surface chemistry is a subject of immense importance and has implications both to our everyday life and to numerous industrial sectors from paints and materials to medicine and biotechnology. When we observe nature, we are impressed by mosquitos and other small insects that can walk on water but are drawn into the water when detergents soaps are added in their neighbourhood. We are fascinated by the spherical shape of water and even more by the mercury droplets that can roll around without wetting anything. We know that for the same reasons we should use plastic raincoats when it is raining.
This book provides an introduction to colloid science, based on the application of the principles of physical chemistry. Early chapters assume only an elementary knowledge of physical chemistry and provide the basis for more thorough discussion in later chapters covering specific aspects of colloid science. The widespread occurrence of colloids is stressed and the more important industrial applications of colloid technology are outlined. The final chapter deals with the future of colloid science and indicates the directions in which further developments are likely to take place. The book is ideal for undergraduate courses and, supplemented by further reading, for postgraduates too.