Assertion : Detergents with low CMC are more economical to use. The quantity of the electrolyte which is required to coagulate a definite amount of a colloidal solution depends upon the valency of the ion having a charge opposite to that of the colloidal particles. Adsorption The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed adsorption . 2.6k VIEWS. Emulsions, surfactants, micelles (only definition and examples). Hindi Chemistry. Question: Name an element with which silicon can be doped to gave an n- type semiconductor? Physicists use antiferromagnetic rust for Faster and Efficient Information Transfer, Crab armies can be a key issue in coral wall preservation, Beaches cannot be extinct if sea levels continue to rise, Autonomous “Smellicopter” Drone Can Seek Out Scents with Live Moth Antennae, Scientists are finally studying why some of you don’t overturn your regulator. Class 12 Chemistry Surface Chemistry: Electrophoresis: Electrophoresis-The movement of colloidal particles under the influence of an electric field is called electrophoresis. Accordingly, negative ions cause coagulation of positively charged sols and positive ions cause coagulation of negatively charged sols. KCl, an electrolyte, is added to an hydrated ferric hydroxide sol. Question from very important topics are covered by NCERT Exemplar Class 12.You also get idea about the type of questions and method to answer in your class 12th … Share with your friends. What is a protective colloid? On the basis of Hardy-schulze rule explain why the coagulating power of phosphate is higher than chloride ? Thus, Hardy-Schulze law can be modified in terms of the polarizing power of the flocculating ion. 2 PAPER I –THEORY – 70 Marks 1. Question: What is meant by term Broadspectrum antibiotic, Give example? Explain hardy-schulze law with examples The coagulating or flocculate capacity of an electrolyte increases with increase in charge is known as Hardy – Schulze law. Name the type of colloid formed when eggs white portion is mixed with water. In a sentence this rule state as “Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the coagulation”. Al 3+ Ba 2+ Na + None of the Above; Answer the following questions in one or two sentences: (vi) What type of stoichiometric defect is shown by ZnS ? A simple and inexpensive experiment for verifying the schulze hardy rule. This leads to coagulation. Question 15. According to hardy schulze rule greater the valency of the active ion or flocculating ion greater will be its coagulating power. Hardy-Schulze Rule-The greater the valency of the flocculating ion added, the greater is its precipitation. This law takes into contemplation only the charge carried by an ion, not its size. what is hardy schulze rule ? Chemically Rust Is 1 Hydrated Ferrous Oxide 2 Hydrated Ferric Oxide 3 Only Ferric Oxide 4 None Of Th... Write The Balanced Chemical Equations For The Following Reactions Zinc Silver Nitrate Zinc Nitrate S... 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The ions of the electrolyte that are effective in causing coagulation are the ones that carry a charge which is opposite to the charge held by the colloidal particles. Greater is the valency of the coagulating or the Flocculating ion, greater is its power to bring about the coagulation. Coagulation & Gold No. Surface chemistry ppt CLASS 12 CBSE CHAPTER 5 1. Some important points related to the Hardy Schulze law are listed below. The required amount of electrolyte for the coagulation of a definite quantity of colloidal solution is dependent on the valency of the coagulating ion (which is the ion that holds a charge which is opposite to the charge of the colloidal particles). (viii) What do you mean by Peptide linkage ? 19. Blog. Click hereto get an answer to your question ️ Q104.Hardy-Schulze rule explains the effect of electrolytes on the coagulation of colloidal solution. (c) How many isomers are there for octahedral complex, [CoCl 2 (en)(NH 3) 2] + ? Share 68. (a) Tyndall Effect : Scattering of light by colloidal particles by which part of beam becomes clearly visible. Question: What is the co-ordination number of … Download PDF's. Show all posts. Career. Hardy Schulze Rule: The coagulation capacity of different electrolytes is different. Application of colloids and emulsions in daily life. • Hardy-Schulze rule The greater is the valence of the oppositely charged ion of the 43. Your email address will not be published. Adsorbate: It is the […] Solid State ... Hardy- Schulze rule. Hardy-Schulze rule: The coagulation power of precipitated ion is more if its valency is high. The coagulation of the lyophobic sols can be carried out by following methods. These are formed when the concentration of detergents becomes equal to CMC. The coagulation capacity of different electrolytes is different. Negatively charged particles move towards the cathode and Positively charged particles moves towards anode. Thus, the modified Hardy-Schulze law can be stated as ‘the greater the polarising power of the flocculating ion added, the greater is its power to cause precipitation.’ Previous Question Next Question Popular Questions of Class 12th chemistry Likewise, arsenic sulfide sol, which is negatively charged, is coagulated by positive ions. Showing posts with label hardy schulze rule class 12. Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the coagulation. 1 answer. Thus, the modified Hardy-Schulze law can be stated as ‘the greater the polarizing power of the flocculating ion added, the greater is its power to cause precipitation.’. For negative sols, when positive ions are added; Al 3+ > Ba 2+ >Na + is the order in terms of flocculating power. SULEKHA RANI.R, P.G.T CHEMISTRY KENDRIYA VIDYALAYA NTPC KAYAMKULAM Model Question Paper: Class XII 1. CBSE Class 12 Chemistry Quick Revision Notes Chapter 5 Surface Chemistry Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Class-12-science » Chemistry. Watch Now. NCERT RD Sharma Cengage KC Sinha. State Hardy Schulze rule. A lyophillic colloid which is used to protect lyophobic colloid from electrolyte and from getting coagulated is called protective colloid. Power to cause precipitation increases: Al. Surface Chemistry. The quantity of the electrolyte which is required to coagulate a definite amount of colloidol solution depends upon the valency of the ion having a charge opposite to the colloidal particles. 2.6k SHARES. According to Hardy-Schulze rule, greater the valency of the active ion or flocculating ion, greater will be its coagulating power. Hardy Schulze Rule. Show all posts. Then, the neutral particles begin accumulating and form bigger extent particles which settle down as a precipitate. Hardy-Schulze rule: The coagulation power of precipitated ion is more if its valency is high. Sulekha Rani.R, PGT Chemistry,KV NTPC kayamkulam Chemistry Question Paper - 11 CBSE Board QP 2012 set 2 . This observation is often referred to as the Hardy Schulze law. In a sentence this rule state as “Greater is the valency of the oppositely charged ion of the electrolyte being added, the … Cause precipitation ( Hardy Schulze rule, greater is its power to cause precipitation ( Hardy-Schulze rule, purification protection... Type of colloid formed hardy schulze rule class 12 eggs white portion is mixed with water the more will be in! And Ba 2+ > Na + towards the cathode and Positively charged sols of detergents becomes equal to.. Is meant by term Broadspectrum antibiotic, Give example 0 votes 1 10... Accordingly, negative ions cause coagulation of a coagulating ion, not its size Schulze. Vary in them greater will be its coagulating power CBSE Chapter 5.... 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