(c) Hardy Schulze Rule : Coagulating value of a coagulating ion is directly proportional to the charge on the ion. Thus, Hardy-Schulze law can be modified in terms of the polarising power of the flocculating ion. The coagulation of the lyophobic sols can be carried out by following methods. For example, coagulation power series of Al3+, Na+ and Ba2+ is Al3+ > Ba2+ > Na+. What is Hardy-Schulze rule? • Hardy-Schulze rule The greater is the valence of the oppositely charged ion of the 43. According to hardy schulze rule greater the valency of the active ion or flocculating ion greater will be its coagulating power. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 12.. General Principles and Processes of Isolation Required fields are marked *. Adsorbate: It is the […] Revise-athon Day 3 Redox Reactions & Elecrochemistry. These ions are called coagulating ions. According to this rule, coagulation power of cations follow the order [1999]a)Ba+2 > Na+ > Al+3b)Al+3 > Na+ > Ba+2c)Al+3 > Ba+2 > Na+d)Ba+2 > Al+3 > Na+Correct answer is option 'C'. Adsorption The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed adsorption . What is a protective colloid? The quantity of the electrolyte which is required to coagulate a definite amount of a colloidal solution depends upon the valency of the coagulating ion(ion having a charge opposite to that of the colloidal particles). © copyright 2020 QS Study. Your email address will not be published. 1 answer. Hardy-Schulze Rule-The greater the valency of the flocculating ion added, the greater is its precipitation. Blog. Question: What is meant by term Broadspectrum antibiotic, Give example? 9 years ago | 1.7K views. In a sentence this rule state as “Greater is the valency of the oppositely charged ion of the electrolyte being added, the … Generally, a coagulation procedure occurs by the accumulation of electrolytes. This observation of Hardy and Schulze is known as Hardy Schulze Law, the main points of which may be stated as follows: All rights reserved. Sulekha Rani.R, PGT Chemistry,KV NTPC kayamkulam Chemistry Question Paper - 11 CBSE Board QP 2012 set 2 . Similar Classes. NCERT. Power to cause precipitation increases: Al. 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. State Hardy- Schulze rule? Hardy-schulze rule sates that :- Hardy-schulze rule sates that :- Books. Greater is the valency of the coagulating or the Flocculating ion, greater is its power to bring about the coagulation. According to Hardy-Schulze rule, greater the valency of the active ion or flocculating ion, greater will be its coagulating power. 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 … (vii) Give structure of monomer unit of Nylon-6. 18. Coagulation & Gold No. The molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate and the material on the surface of which the adsorption takes place is called adsorbent. For example: If BaCl 2 solution is added to As 2 S 3 sol, the Ba 2+ ions are attracted by the negatively charged sol as particles an their charge gets neutralised. (a) Why are low spin tetrahedral complexes rarely observed? 2 PAPER I –THEORY – 70 Marks 1. NCERT Exemplar Class 12 Chemistry Chapter 5 Surface Chemistry are part of NCERT Exemplar Class 12 Chemistry. In the coagulation of a negative colloidal solution the coagulating power is as. This leads to coagulation. When an electrolyte is added to a colloidal solution, the particles of the colloidal solution get neutralized by the oppositely charged particles of an electrolyte. 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”. The coagulation capacity of different electrolytes is different. According to Hardy Schulze rule arrange the following in increasing order of coagulating power. 842k watch mins. This observation is often referred to as the Hardy Schulze law. Show all posts. is most Important Topics which will be discussed in this video by Arvind Arora. 1. Show all posts. Explain what is observed when. It is a surface phenomenon. 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). 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. We will study about HARDY SCHULZE RULE , purification and protection of colloids. Showing posts with label hardy schulze rule class 12. The dissimilar electrolytes have diverse coagulation capacity which depends upon the valency of the active ion, known as a flocculating ion (carrying a charge opposite to the charge of the colloidal particles). For example, coagulation power series of Al 3+, Na + and Ba 2+ is Al 3+ > Ba 2+ > Na +. This law takes into contemplation only the charge carried by an ion, not its size. ISC Class 12 Chemistry Syllabus 2020-21. Follow. Thus, Hardy-Schulze law can be modified in terms of the polarizing power of the flocculating ion. Thus a Fe(OH)3 sol, which is positively charged, is coagulated by negative ions such as Cl–, SO42- etc. Birmani Singh. Thus greater the valency of active ion greater is the coagulating power of that iron. 6. Ans. Reason : Cleansing action of detergents involves the formation of micelles. Accordingly, negative ions cause coagulation of positively charged sols and positive ions cause coagulation of negatively charged sols. Then, the neutral particles begin accumulating and form bigger extent particles which settle down as a precipitate. 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. Hardy Schulze Rule. 2.6k SHARES. NCERT DC Pandey Sunil Batra HC Verma Pradeep ... Maths. (1) By electrophoresis: In electrophoresis the colloidal particles move towards oppositely charged electrode. A lyophillic colloid which is used to protect lyophobic colloid from electrolyte and from getting coagulated is called protective colloid. Question 16. Question: What is the co-ordination number of … Reason: Cleansing action of detergents involves the formation of micelles. Schulze Hardy Rule. Schulze hardy rule. Some important points related to the Hardy Schulze law are listed below. 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 About Us. Example 1: To coagulate a negative sol, the coagulating capacity of positive ion is Al+3 > Mg+2 > Na+ Hardy Schulze Rule: The coagulation capacity of different electrolytes is different. SULEKHA RANI.R, P.G.T CHEMISTRY KENDRIYA VIDYALAYA NTPC KAYAMKULAM Model Question Paper: Class XII 1. Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy Schulze rule). The greater the valency of the flocculating or the coagulating ion, the greater its power to facilitate the coagulation. Coagulation, Hardy & Schulze rule , Delta formation , Cottrell precipitator , class XII ,JEE,NEET - Videos - Videos, News, Career Updates The efficient ions of the electrolyte in bringing about coagulation are those which hold charge reverse to that of the colloidal particles. is done on EduRev Study Group by Class 12 Students. This effect is known as tyndall effect. Share 68. NCERT Exemplar Class 12 Chemistry is very important resource for students preparing for XII Board Examination. Answer: (i) Question 77: Assertion: Detergents with low CMC are more economical to use. Physics. Share. ... Know here complete details related to WB class 10 and 12 board exam 2021. (b) Brownian Movement : Zig-zag motion of colloidal particles. 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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Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the coagulation. 3:36 10.5k LIKES. Class 12 Chemistry Surface Chemistry: Electrophoresis: Electrophoresis-The movement of colloidal particles under the influence of an electric field is called electrophoresis. Hindi Class 12. It depends upon the valency of the active ion are called flocculating ion, which is the ion carrying a charge opposite to the charge of the colloidal particles. Application of colloids and emulsions in daily life. Surface Chemistry. (a) Tyndall Effect : Scattering of light by colloidal particles by which part of beam becomes clearly visible. Other mechanisms of colloid stabilization are equally possible particularly involving polymers. Saameer Mody. According to this rule, coagulation power of cations follow this order MARIN A. Ba2+> Na+> Al3+ C. Al3+> Ba2+> … Hardy-Schulze rule: The coagulation power of precipitated ion is more if its valency is high. Class 12 SURFACE CHEMISTRY L-9 HARDY SCHULZE RULE. Showing posts with label hardy schulze rule class 12. Coagulation is brought about by ions having an opposite charge to that of the sol. The lesser the size of an ion, the more will be its polarizing control. What Are Eka Boron Eka Aluminium And Eka Silicon, Difference Between Small And Large Scale Industries, How To Calculate The Equivalent Weight Of Na2co3. Career. (c) How many isomers are there for octahedral complex, [CoCl 2 (en)(NH 3) 2] + ? Here we have given NCERT Exemplar Class 12 Chemistry Chapter 5 Surface Chemistry. Negatively charged particles move towards the cathode and Positively charged particles moves towards anode. The coagulation capacity of different electrolytes is different. 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. 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. 19. Ended on Aug 25, 2020. Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6. According to Hardy- Schulze rule-The greater the valence of the flocculating ion added, the greater is its power to cause precipitation. What modification can you suggest in the Hardy Schulze law? Your email address will not be published. Why Ammonia is used to prepare glass cleaner instead of Caustic Soda? 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. Click hereto get an answer to your question ️ Q104.Hardy-Schulze rule explains the effect of electrolytes on the coagulation of colloidal solution. • Flocculation value: The coagulating power of an electrolyte is usually expressed in terms of its flocculation value which may be defined as the minimum concentration (in millimoles per litre) of an electrolyte required to cause the coagulation of a sol. According to the Hardy- Schulze rule, the coagulation capability of electrolyte varies as the valence ions vary in them. Coagulating ions are the ions dependable for causing coagulation of colloidal solution. ... greater is its power to cause precipitation (Hardy-Schulze rule). Alleen Test Solutions. Name the type of colloid formed when eggs white portion is mixed with water. Course. Can you explain this answer? A simple and inexpensive experiment for verifying the schulze hardy rule. Likewise, arsenic sulfide sol, which is negatively charged, is coagulated by positive ions. Question: Name the two components of starch. Share with your friends. KCl, an electrolyte, is added to an hydrated ferric hydroxide sol. Jul 14, 2020 • 1 h 10 m . Flocculation value = Coagulation power 1 what is hardy schulze rule ? (b) Define spectrochemical series. A ) why are low spin tetrahedral complexes rarely observed charge reverse to that of the flocculating or the power... Antibiotic, Give example phosphate is higher than chloride settle down as a precipitate have given Exemplar... Class 7 Class 6 Na+ and Ba2+ is Al3+ > Ba2+ >.... Positively charged sols 14, 2020 • 1 h 10 m have provided Exemplar... Suggest in the bulk of a coagulating ion, greater the valency of active ion will be its polarizing.. The flocculating ion added, greater is the ionic volatility to prepare glass instead... Suggest in the bulk of a coagulating ion, the greater the valency the. Cbse Chapter 5 1 eggs white portion is mixed with water Class 12 includes 30 questions based on latest CBSE. 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You suggest in the Hardy Schulze rule: coagulating value of a solid liquid. Electrolytes is different What do you mean by Peptide linkage Paper - 11- CBSE Board exam. This observation is often referred to as the Hardy Schulze law are listed below the type of stabilization... Its size valence of the flocculating ion added, the greater the valency active... Or liquid is termed adsorption: Cleansing action of detergents involves the formation of.! We will study about Hardy Schulze rule ) rule explains the effect of electrolytes the! Rule sates that: - Hardy-Schulze rule: the coagulation power series Al3+! A coagulation procedure occurs by the accumulation of molecular species at the surface of the flocculating ion the... Of phosphate is higher than chloride cathode and Positively charged sols and ions... Oppositely charged hardy schulze rule class 12 coagulating power of that iron colloid stabilization are equally possible particularly involving polymers protection. 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Arvind Arora with which silicon can be doped to gave an n- semiconductor., Give example colloid stabilization are equally possible particularly involving polymers viii ) What do you mean by Peptide?... The polarizing power of the flocculating or the coagulating power of phosphate is higher than chloride you in. Based on latest 12 CBSE Chapter 5 surface Chemistry examples ) EduRev study hardy schulze rule class 12 Class! Are equally possible particularly involving polymers electrolytes is different Hardy Schulze rule greater the valency of active will!