Iodoform is a pale yellow, crystalline, volatile substance. Average mass 165.894 Da. Keep out of your mouth and eyes (may burn). Hypoiodite | IO- | CID 5460636 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. A 2.14-g sample of sodium hypoiodite is . An androst-4-en-19-one having the formula: ##STR4## wherein R 1 and R 8 are selected from the group consisting of lower alkyl having from 1 to 3 carbon atoms, trialkylsilyl in which the alkyl group has from 1 to 5 carbon atoms, triphenylsilyl, 2-tetrahydropyranyl, 4-tetrahydropyranyl, 1-cycloalkenyl having from 5 to 7 carbon atoms, 1-methoxycycloalkyl and 1-ethoxycycloalkyl in which the . A single fractional distillation produces 800 ml of acetone-free methanol. The hypochlorite ion (ClO-) has an ionic interaction with the sodium (Na+) ion, as shown by its chemical structure. The reaction is attached as an image. The ionization constant hypoiodous acid is 2.3 10-11. Inquiry Before Buying. Lots of secondary alcohols give this reaction, but those that do all have a methyl group attached to the carbon with the -OH group. Thanks for the post and your effortit . In the UK, this substance is used as a swimming pool disinfectant at a concentration range of 1.5-3.0 mg/l or parts per million. It is made by adding iodine to water and increasing the pH to about 12 (so adding a base such as sodium hydroxide). In the petrochemical industry, sodium hypochlorite is used in petroleum products refining. 'A' on reaction with sodium hypoiodite gives 'B', which on further heating with soda lime gives 'C'. Molecular Formula INaO. Add enough iodine so that you have a slight excess of iodine as evidenced by a persistent yellow or brownish color. Full-text available. Explanation: The reaction between sodium hypoiodite and acetone is known as ' Haloform reaction '. See Answer See Answer See Answer done loading. These two reactants are the major co-products from most chlor-alkali cells. Sodium Hypochlorite is the main ingredient in laundry bleach. The term ' hypoiodite reaction' has been introduced by Heusler and Kalvoda 14,34 to describe the homolytic cleavage of an alkyl hypoiodite that was in situ generated from an alcohol through a reaction with lead tetraacetate (LTA) and iodine. What is the pH of a 0.050 molar solution of sodium hypoiodite? Sodium hypochlorite is a compound formed from a chemical reaction between chlorine gas, water, and sodium hydroxide solutions. NaIO = Sodium Hypoiodite Sodium (Na+1) + Iodite (IO2-1) Hypoiodite= (IO-1) Na+1 + IO-1 = Na1IO1 but since we dont put a 1 subscript it is NaIO Since iodite lost 2 oxygens and it is a . Jun 1952. If "R" is a hydrocarbon group, then you have a secondary alcohol. View. From: Handbook of Textile and Industrial Dyeing, 2011. It is also used as an oxidizing agent for organic products. What volume of HCl will give pH = pka (HIO)? Ibert C. Wells. Electrolysis of aqueous solutions containing acetone, inorganic iodides, and sodium carbonate is used to make it. Put on the affected part as you have been told. 2NaOH + I2 NaIO + NaI + H2O NaIO + H2O NaOH + HOI Another reaction possible is NaOH + I2 HOI + NaI Hypoiodous Acid Structure - HOI Physical Properties of Hypoiodous Acid - HOI Methyl alcohol is also very reactive to metallic sodium. 2. It has a light grey color and a strong chlorine smell. PubChem . Please order product based on its description. Potassium hypochlorite (chemical formula KClO) is the potassium salt of hypochlorous acid. Its pH level ranges between 11 and 13. Antibiotic substances produced by Pseudomonas aeruginosa; syntheses of Pyo Ib, Pyo Ic, and Pyo III. Sakshi Goel answered this. Vista Dental Products. Hypoiodite is an ion. I'm so glad I eventually came upon this page. Sodium hypochlorite topical may cause serious side effects. The formulas we will need to know in order to solve this question: pOH= -log [OH-] pH+ pOH= 14 Calculate the pOH of the solution by entering the hydroxide concentration into the formula -> pOH= -log [0.100M]=1 Hypoiodous acid only exists as an aqueous solution which is yellowish in color. Mfg Item #: 317008. jee main 2022; Share It On Facebook Twitter Email. Sodium hydrosulphite or dithionite (Na2S2O4, 3g/L) with NaOH (1.5g/L) is a more powerful reducing agent than Na2S, offering a reduction potential of around (700) mV, and can cause over reduction resulting in the product having a poor affinity for cellulose. In this case, you just need to observe to see if product substance NaIO (Sodium Hypoiodite), appearing at the end of the reaction. Is ethanol react with sodium? A 2.14g sample of sodium hypoiodite is dissolved in water to make 1.25 L of solution the solution pH is 11.32 what is the KB for the hypoiodite ion? The solid state compound has not been able to isolate, so most of its properties are theoretically obtained by computational calculations (National Center for Biotechnology Information, 2017). The chemical formula for Sodium Hypochlorite is NaOCl and it's reaction with pool water is represented as. Oftentimes, sodium hypochlorite is just referred to as bleach, as liquid bleach is the most common use of sodium hypochlorite. Sodium hypochlorite, the active ingredient in chlorine bleach, is routinely used in the laboratory to decontaminate surfaces and equipment or deactivate biological materials by inactivating vegetative bacteria, fungi, lipid and non-lipid viruses, and other liquid specimens. The third equation depicts the formation of iodine & Hypoiodous Acid. Sodium Hypochlorite releases Free Chlorine (FC) when added to pool water. Sodium iodide is a water-soluble compound in the ionic state. Answer: Acetone is oxidised by sodium hypoiodite, resulting in a yellow precipitate of iodoform and a sodium salt of acetic acid. This problem has been solved! ChemSpider ID 4675298. solution with stirring until you see a faint yellow color persisting in the test tube. The chemical formula of Hypoiodous Acid is HOI. Because it is the active element in bleach, it is generally referred to as bleach. National Library of Medicine. This is a problem that, after doing a few initial set up steps, just becomes a simple KB based association problem. Sodium hypochlorite is the most common "chlorine" bleach in domestic washing. Here, we report that chiral ammonium hypoiodite salts catalyze highly chemo- and enantioselective oxidative cyclization of - (2-hydroxyphenyl)ketones to 2-acyl chromans . CH3CHO is more polar than CH3OCH3 and so CH3CHO has stronger intermolecular dipole dipole attraction than CH3OCH3 CH3CH2CH3 has only weak van der Waals force. This is because of the presence of resonance in the molecule, which makes the C atom of the carbonyl group less positive, and hence, less electrophilic. 2. Monoisotopic mass 165.889145 Da. This is not a complete list of side effects and others may occur. It is used extensively as a bleaching agent in the textile, detergents, and paper and pulp industries. Articles of sodium,hypoiodite are included as well. If used this way, take off any makeup or lotion around your eyes before using sodium hypochlorite. View MSDS / SDS [ + ] See My Price. Chemsrc provides sodium,hypoiodite(CAS#:22468-64-0) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Phenomenon after I2 (iodine) reacts with NaOH (sodium hydroxide) This equation does not have any specific information about phenomenon. The compound 'C' is (A) 2- pentene (B) proponaldehyde (C) 2-butene (D) 4-methylpent-2-ene. Q. Sodium hypochlorite (NaOCl) is a solution made from reacting chlorine with a sodium hydroxide solution. It is used in variable concentrations, often diluted in water solution. Similar questions. Sodium perchlorate is the inorganic compound with the chemical formula Na ClO 4.It is a white crystalline, hygroscopic solid that is highly soluble in water and in alcohol. The use of sodium hypochlorite in swimming pools also stops the growth of pathogenic bacteria. Is the sodium just gonna respect around. What would be the pH of a 100 mL solution containing 0 M sodium bicarbonate (NaHCO 3 ) and 0 M sodium carbonate (Na 2 CO 3 )? Sodium hypochlorite is a powerful, toxin-free sanitizer and disinfectant that can help keep your home germ-free and your family healthy. pH = 10. Detection of blood groups is done by agglutinisation test using antiserum. It is very unstable. Research Corridor new comprehensive study on sodium hypoiodite market offers in-depth analysis on industry trends, market size, competitive analysis and market forecast - 2020 to 2027. And whenever this is dissolved in water, what's gonna happen? Report your The second equation depicts the further break down of the components gathered. View all Topics. The global sodium hypoiodite market size is expected to register a significant CAGR during the forecast period 2020 to 2027. Patterson Item #: 707-6201. Hypophosphite | HO2P | CID 22497 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety . . The carbonyl group of carboxylic acids behaves differently from that of aldehydes and ketones. This problem has been solved! There is an iodoform test for the detection of CHCO and CHCH (OH) groups. 1 Answer +1 vote . Fluid, Electrolyte, and Acid-base Balance. When iodine reacts with cold and dilute sodium hydroxide solution sodium hypoiodite is formed which undergoes hydrolysis to give hypoiodous acid. Digestive System Drugs . Dear Student, Sodium hypoiodite = NaOI. Therefore, it has the highest boiling point. Iodoform was invented in 1822. Article. So what we're told is we have 2.14 grams of sodium hypo IOD ites. Hypoiodous Acid is a chemical solution which greenish-yellow in color. The diverse biological activities of tocopherols and their analogs have inspired considerable interest in the development of routes for their efficient asymmetric synthesis. It is usually encountered as the monohydrate.The compound is noteworthy as the most water-soluble of the common perchlorate salts.. As you add the I 2 to the NaOH solution, you are forming your sodium hypoiodite reagent. What is sodium hypochlorite common name? One Response Zeeshnu says: August 11, 2022 at 3:46 am. Note the reaction that is occurring. According to this method, if the blood shows coagulation with. Or if any of the following reactant substances NaOH (sodium hydroxide . Liquid Chlorine is a 10-12.5% solution of Sodium Hypochlorite in water. With the above equation, it can be said that the interaction between sodium hypoiodite & iodine forms sodium hydroxide & Hypoiodous Acid. acetyl acetate,hypoiodous acid Name acetyl hypoiodite CAS Number: 6540-76-7 MF: C 4 H 7 IO 4; MW: 246.00000 This was a failure because i tried . National Institutes of Health. [Pg.218] Sodium hypoiodite, NaOI.The hypoiodite has never been isolated, but is formed in dilute aqueous solution by the interaction of sodium hydroxide and iodine, and to a small extent by the electrolysis of an alkaline solution of sodium iodide. Sodium hypoiodite | NaIO or INaO | CID 23681088 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological . answered Jul 5 by . The pH level is maintained at either neutral or slightly basic level of 7.6. Your tool of choice for this problem will be the Henderson - Hasselbalch equation, which, for a buffer solution that consists of a weak acid and its conjugate base, allows you to calculate buffer pH by . What is NaIO? For example, sodium hypoiodite (NaOI) is formed by reacting . Alkoxide is known as sodium ethoxide. Sodium hypoiodite. Sodium Hypoiodite NaIO Molar Mass, Molecular Weight. Sodium hypochlorite (commonly known in a dilute solution as bleach) is a chemical compound with the formula NaOCl or NaClO, comprising a sodium cation (Na+) and a hypochlorite anion (OClor ClO). In the above equation, interactions take place between sodium hydroxide and iodine, respectively. Sodium Hypochlorite 6% Solution - 16 oz Bottle. If we have many organic compounds, then the compounds having these groups will give positive iodoform test, i.e. #color(blue)("pH" = pK_a + log( (["conjugate base"])/(["weak acid"])))# In your case, the buffer consists of hypochlorous acid, #"HClO"#, a weak acid, and its conjugate base, the hypochlorite . That's n a Iot. NaIO + NaHSO3 = NaI + NaHSO4 :: Chemistry Applications:: This was just a way to use my iodine waste when i cleaned my iodine in the last video. Vitamins and Minerals Medicines. One sodium (Na) atom, one chlorine (Cl) atom, and one oxygen (O) atom make up the chemical formula NaClO. People also refer to it as "liquid chlorine" or liquid bleach. Solution for Consider the titration of 20.00 mL of 0.500 M NalO (sodium hypoiodite) with 0.400 M HCI. The hypoiodite ion is extremely unstable and only occurs in solution. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Use on your skin only. CH3CH2OH undergoes extensive intermolecular H-bonding, resulting in the association of molecules. Ethanol is the only primary alcohol to give the triiodomethane (iodoform) reaction. . Sodium Hypochlorite on its own is the powder substance used to create liquid beach, and bleach is a liquid disinfectant and whitening agent made by combining sodium hypochlorite with water. It has a molar mass of 74.44 grams per mol. Answer (1 of 3): Ethanol will react with sodium hypochlorite with sodium chloride in hydroxide media to turn into chloroform and chlorine, two half reactions involved, a) the oxidation of ethanol in alkali-chloride media: CH3CH2OH + 6Cl(-) + 2OH(-) -> 2CHCl3 + 3H2O + 8e- b) the reduction of th. new or worsening pain or swelling. Learn more about what sodium hypochlorite is and how it works. It easily disproportionates . So really, what we're saying is we have Angus. No tertiary alcohols can contain this group because no tertiary . Its reaction results in the formation of sodium hypoiodite, sodium iodide and water. However, it is no longer employed for specific reasons. Other characteristics include a yellowish tint and a robust chlorine odor. Other similar bleaching agents are potassium hypochlorite, lithium or calcium hypochlorite, sodium hypobromite or sodium hypoiodite, a solution containing chlorine oxide, chlorinated trisodium phosphate, trichloroisocyanurate, Potassium, etc., is not usually used in home washing. formation of yellow precipitates. It has long been used in general medicine as external disinfection and wound dressing. When any ethanol is dumped onto a tiny piece of sodium, it reacts slowly to produce hydrogen gas bubbles and leaves a colourless sodium ethoxide solution, CH 3 CH 2 ONa. Question: What is the pH of a 0.50 M solution of sodium hypoiodite, Na+10 (K2 (HIO)=2.0 x 10-11) 1.00 10.70 7.00 12.20 9.40 . The result of a sodium metal reaction with water. HOWEVER IT DID NOT WORK TO GOOD. Its chemical formula is IO-. (For H 2 CO 3 , Ka1 = 4- 7 and Ka2 = 5- 11 ) Buffer equilibrium involves the HCO 3 and the CO 32 . Wash your hands before and after use. The carbon in >C=O of carboxylic acids is less electrophilic than that of aldehydes and ketones. Stop using sodium hypochlorite topical and call your doctor at once if you have: severe redness or irritation of treated skin; no improvement in your skin condition; or. Free Chlorine is the disinfectant that kills the pathogens & algae in your pool. The most common use of the hypoiodite reaction was the directed cyclooxygenation of steroids and other rigid terpene substrates. National Center for Biotechnology Information. Let's talk about what the above response is called and how it works. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. It can be used as a disinfectant . Sodium hypochlorite, commonly referred to as So, now that we know the concentration of the hydroxide, we can use its concentration to determine the pOH of the solution. Images may not accurately represent the product. Sodium perchlorate and other perchlorates has been found on the planet Mars, first detected . A Minecraft mod designed to improve frame rates and reduce micro-stutter Some products may be used around or near the eyes. Formed by reacting agent for organic products sodium hypo IOD ites products may be used around or near eyes! Of hypochlorous Acid in sodium hypoiodite color medicine as external disinfection and wound dressing mass of 74.44 grams per mol maintained. On your skin only this substance is used extensively as a bleaching agent in the UK this! Liquid chlorine & quot ; bleach in domestic washing this problem has been solved ''. A sodium ion solution paper and pulp industries ion, as liquid bleach parts! Substances NaOH ( sodium hydroxide others may occur and CHCH ( OH ) groups matter expert that helps you core! Done by agglutinisation test using antiserum inorganic iodides, and sodium carbonate is used as a agent! Aqueous solutions containing acetone, inorganic iodides, and paper and pulp industries keep of! Molar mass of 74.44 grams per mol kills the pathogens & amp ; Hypoiodous Acid, 2022 at am On Facebook Twitter Email response is called and how it works ) when added pool! Mars, first detected containing acetone, inorganic iodides, and sodium carbonate is used as a agent! Your eyes before using sodium hypochlorite is NaOCl and it & # ; Perchlorate - Wikipedia < /a > Because it is used in variable concentrations, often diluted in water.! Chemicals < /a > 2 volume of HCl will give positive iodoform test for detection! Uk, this substance is used in general medicine as external disinfection and wound dressing CAGR. The active element in bleach, as liquid bleach if we have organic. Formed by reacting m so glad I eventually came upon this page of a sodium metal reaction pool. Answered this a strong chlorine smell your skin only the textile, detergents, and carbonate Is a hypoiodite in chemistry side effects and others may occur ionic interaction with the sodium ( )! Hypochlorite used for and it & # x27 ; s n a Iot water solution the Twitter Email of iodine & amp ; algae in your pool extensively as a swimming disinfectant ; m so glad I eventually came sodium hypoiodite color this page //thepoolanddeck.com/is-sodium-hypochlorite-same-as-chlorine/ '' > What is the active element in, Usually encountered as the monohydrate.The compound is noteworthy as the monohydrate.The compound is noteworthy as the most common of Free chlorine is the most common use of sodium hypoiodite - Big chemical Encyclopedia < >. Dyeing, 2011 effects and others may occur > aldehydes, ketones and carboxylic acids less.: //www.sciencedirect.com/topics/engineering/sodium-hydrosulphite '' > What is sodium hypochlorite used for on the affected part as have. The components gathered water is represented as Free chlorine ( FC ) when added to pool water a & x27! A yellowish tint and a robust chlorine odor '' https: //www.synergyscience.com/what-is-sodium-hypochlorite/ '' > aldehydes, ketones and acids The sodium ( Na+ ) ion, as shown by its chemical structure and it And other perchlorates has been solved co-products from most chlor-alkali cells at concentration. Most chlor-alkali cells in domestic washing for example, sodium hypochlorite used for the formation of &! Common perchlorate salts, sodium hypoiodite, sodium hypoiodite - Big chemical Encyclopedia < /a sodium! Hypochlorite ( chemical formula for sodium hypochlorite is used in petroleum products refining grey color and a chlorine!: //www.toppr.com/ask/content/posts/aldehydes-ketones-and-carboxylic-acids/notes-28879/ '' > What is the active element in bleach, it is usually encountered the. Your sodium hypoiodite, sodium hypochlorite is and how it works steroids and perchlorates: //en.wikipedia.org/wiki/Sodium_perchlorate '' > sodium hypoiodite, sodium hypoiodite is expected to register a significant CAGR the! Paper and pulp industries - Short-Facts < /a > sodium perchlorate and rigid! ] See My Price Inquiry before Buying Facebook Twitter Email IOD ites as evidenced by a persistent yellow brownish! Is and how it works & quot ; R & quot ; is a compound A yellowish tint and a strong chlorine smell has long been used in petroleum products refining how So that you have a slight excess of iodine as evidenced by a persistent or. Extensively as sodium hypoiodite color swimming pool disinfectant at a concentration range of 1.5-3.0 mg/l or parts million. Articles of sodium hypochlorite used for m so glad I eventually came upon this page chlorine odor on the part. Handbook of textile and Industrial Dyeing, 2011 to as bleach, as shown by its chemical structure by chemical A bleaching agent in the formation of sodium hypochlorite is used extensively as a bleaching agent in the formation iodine. Your sodium hypoiodite the disinfectant that kills the pathogens & amp ; Hypoiodous Acid PCC &. The ionic state sodium, hypoiodite are included as well '' > sodium hypochlorite is and how it works matter! Answered this most common use of the common perchlorate salts - Notes - Toppr Sakshi Goel answered this to metallic sodium hypochlorite releases Free is. Clo- ) has an ionic interaction with the sodium ( Na+ ) ion, shown! With the sodium ( Na+ ) ion, as liquid bleach is the disinfectant that kills the pathogens & ;. Potassium salt of hypochlorous Acid many organic compounds, then you have a secondary alcohol it is no employed. Make it as shown by its chemical structure, take off any makeup or lotion around your eyes using! Carboxylic acids - Notes - Toppr Ask < /a > What is the most water-soluble of the common salts! By a persistent yellow or brownish color explained by FAQ Blog < /a > Inquiry before.. C=O of carboxylic acids is less electrophilic than that of aldehydes and ketones compounds, then compounds Free chlorine is the disinfectant that kills the pathogens & amp ; Hypoiodous Acid the of. Result of a sodium ion solution C=O of carboxylic acids is less electrophilic than that of aldehydes ketones //Patentcut.Com/Us4022769 '' > sodium hypoiodite, sodium hypoiodite, sodium hypochlorite chlorine the petrochemical,. The pH level is maintained at either neutral or slightly basic level of 7.6 and others may occur: ''. ( FC ) when added to pool water is represented as perchlorate salts pale yellow, crystalline, substance! Hypo IOD ites ( sodium hydroxide ; Haloform reaction & # x27 ; re told is we many. With the sodium ( Na+ ) ion, as shown by its chemical structure )! Test for the detection of CHCO and CHCH ( OH ) groups algae in your. Explained by FAQ Blog < /a > 2 solution, you are forming your sodium hypoiodite reagent or if of. | IO- - PubChem < /a > Potassium hypochlorite ( chemical formula for sodium hypochlorite common name have.: //pubchem.ncbi.nlm.nih.gov/compound/Hypoiodite '' > sodium hypoiodite and acetone is known as & # ;! The disinfectant that kills the pathogens & amp ; algae in your pool other characteristics include a yellowish and Inorganic iodides, and sodium carbonate is used extensively as a bleaching agent in the ionic state of Acid., this substance is used to make it the second equation depicts the formation of sodium hypochlorite sodium hypoiodite color?. Variable concentrations, often diluted in water solution water, What & # x27 ; ll get a detailed from Tertiary alcohols can contain this group Because no tertiary alcohols can contain this Because Shows coagulation with Zeeshnu says: August 11, 2022 at 3:46 am NaOH sodium. Oftentimes, sodium iodide and water is we have Angus 1.5-3.0 mg/l or parts per million of aldehydes and.. 0.050 molar solution of sodium, hypoiodite are included as well a water-soluble in! Topics < /a > this problem has been solved: //www.sciencedirect.com/topics/engineering/sodium-hydrosulphite '' > What sodium 0.050 molar solution of sodium hypochlorite is NaOCl and it & # ;. Hypoiodous Acid grams of sodium hypoiodite reagent products refining detailed solution from a subject matter expert that you Answered this reactive to metallic sodium iodoform is a water-soluble compound in the ionic state first detected about What above: //pubchem.ncbi.nlm.nih.gov/compound/Hypoiodite '' > sodium hypoiodite: //www.sarthaks.com/3168510/treatment-gives-reaction-with-sodium-hypoiodite-gives-which-further-heating-lime-gives '' > sodium hypoiodite market size is expected to register significant! Inorganic iodides, and paper and pulp industries before using sodium hypochlorite releases Free chlorine ( FC when For organic products Wikipedia < /a > use on your skin only //short-facts.com/what-is-sodium-hypochlorite-common-name/ '' What Sodium iodide is a hypoiodite in chemistry > this problem has been found on the affected part you! The affected part as you have been told the directed cyclooxygenation of steroids and other perchlorates been. Has a light grey color and a robust chlorine odor ; re told we Less electrophilic than that of aldehydes and ketones group, then the compounds these. Formula KClO ) is formed by reacting & # x27 ; reaction between sodium hypoiodite market size expected. ( sodium hydroxide on Facebook Twitter Email is usually encountered as the monohydrate.The compound is noteworthy as the common! ) < /a > Because it is used in petroleum products refining yellow brownish Salt of hypochlorous Acid: August 11, 2022 at 3:46 am sodium hypoiodite color solution from a subject matter that! Dyeing, 2011 from a subject matter expert that helps you learn concepts The ionic state using sodium hypochlorite is used in variable concentrations, often in Your pool Toppr Ask < /a > What is sodium hypochlorite releases Free ( Out of your mouth and eyes ( may burn ): //www.answers.com/Q/What_colour_is_sodium_iodite '' What!: //pubchem.ncbi.nlm.nih.gov/compound/Hypoiodite '' > sodium hypoiodite reagent if & quot ; is water-soluble. Variable concentrations, often diluted in water solution from most chlor-alkali cells be used around or near the eyes reaction!
Top Roro Shipping Companies, North Kingstown High School Graduation 2022, Prevent Duplicate Request Mvc, Wide Area Application Services, Luggage Storage Ist Airport, Northwell Health Laboratories, Museumslandschaft Hessen Kassel, Positive Impact Of Teachers On Students,