See this image and copyright information in PMC. Note that pyridine (C,H,N) is a weak base with a p K, of 8.77. This article is part of the themed collection. Weber J, Bonn EL, Auer DL, Kirschneck C, Buchalla W, Scholz KJ, Cieplik F. Clin Oral Investig. picolines, lutidines, collidines. Benefits and Risks of a CPC Mouthrinse. $$. Note that the initial amount of hydroxide, which is set at 0, assumes that the amount that will be produced is significant compared to 10-7 M. Also, the approximations can be attempted since the value of Kb is small. This large change will only occur when one of the two components of the buffer gets used up by virtue of the acid or base that is being added. density matrix. This leads to $[\ce{H3O+}]=4.85*10^{-5}\to\mathrm{pK_a}=4.314$. Round your answer to 1 decimal place. A simple representative is N-methylpyridinium ([C5H5NCH3]+). A balance A: The rate of the reaction is the ratio between the difference in concentration of reactant with respe A: Consider the given information is as follows; You want to get from $[\ce{OH-}]$ to $\mathrm{pOH}$: Calculate the pH of a 0.081M NaCN solution at 25 degrees Celsius. Yano Y, Vogtmann E, Shreves AH, Weinstein SJ, Black A, Diaz-Mayoral N, Wan Y, Zhou W, Hua X, Dagnall CL, Hutchinson A, Jones K, Hicks BD, Wyatt K, Brotzman M, Gerlanc N, Huang WY, Albert PS, Wentzensen N, Abnet CC. Solve for x = (H3O^+) and convert to pH. and transmitted securely.
The aim of the present review is to summarize the current literature on CPC . Round your answer to 1 decimal place. Connect and share knowledge within a single location that is structured and easy to search. pH = -log10 [H+] The reassuring part is that a solution can only have one pH. Corresponding authors, a
RbOH, CsOH, Ca(OH)2, Sr(OH)2, and Ba(OH)2. You have a problem asking about the pH of a salt solution made of both a weak acid and a weak base. Let's call pyridinium chloride just BNHCl so it's the BNH^+ that is hydrolyzed. DOI: 10.1039/C7QO00836H. carlosafonso@ff.ulisboa.pt, c
Pyridinium chloride can be produced by passing hydrogen chloride in pyridine dissolved in diethyl ether. (A) P. stutzeri (strains: , NCIMB 568; , NCIMB 10783; , NCIMB 11358; , NCIMB 11359; , JM302; , JM375). As pyridine is often used as an organic base in chemical reactions, pyridinium salts are produced in many acid-base reactions. Antimicrobial resistance is a serious issue for public health care all over the world. Get a free answer to a quick problem. The pH of a 0.10-M solution of propanoic acid, CH3CH2COOH, a weak organic acid, is measured at equilibrium and found to be 2.93 at 25 C. VASPKIT and SeeK-path recommend different paths. Since all of the approximations are valid, we can use the hydronium ion concentration to calculate the pH.
2023 Mar 21;9(3):252. doi: 10.3390/gels9030252. Hence they are stronger acids than amines and can be more easily deprotonated by bases. It is soluble in water but insoluble in acetone, acetic acid, or ethanol. In this work results on theoretical calculations of acid dissociation constants as p Ka of pyridine, its N -oxide, and their derivatives were done based on the thermodynamic cycle in water and acetonitrile. It is an antiseptic that kills bacteria and other microorganisms. Pyridinium chloride is an organic chemical compound with a formula of C5H5NHCl. This system has appreciable quantities of both pyridine (Py) and pyridinium chloride. Answered: Calculate the pH at 25 C of a 0.41M | bartleby Despite this fact, there is little awareness among the dental community about potential risks of the widespread, unreflected, and potentially even needless use of antiseptics in oral care. If we substitute in the values for this problem (and note, with a buffer we will be able to ignore any redistribution of the appreciable amount of the two species), we get: \[\mathrm{pH = pK_a + \log \left(\dfrac{[Py]}{[PyH^+]} \right ) = 5.22 + \log\left(\dfrac{0.147}{0.189} \right ) = 5.11}\]. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). 8600 Rockville Pike additional info: Medically Reviewed By Colgate Global Scientific Communications. A: The molecular formula of ilmenite is = FeTiO3 This means that pyridinium is a weak acid. This may be appealing to some patients, as alcohol-free CPC mouthrinses may create less of a burning sensation during use and do not promote a bitter taste in the mouth. Thanks for contributing an answer to Chemistry Stack Exchange! \end{align}\]. This site needs JavaScript to work properly. I believe the reaction should be $$\ce{C5H5NHF_{(s)} ->C5H5NH+_{(aq)} + F-_{(aq)}->C5H5N_{(aq)} + HF_{(aq)}}$$ When looking at this, we can start by noting that $\ce{HF}$ is a stronger acid than $\ce{C5H5NH+}$, so the reaction will favor the reactants. 2023 Apr 27;18(4):e0284956. CAS Common Chemistry is provided under the Creative Commons Attribution-NonCommercial 4.0 International License, or CC BY-NC 4.0 license. Cosmetic rinses offer benefits like whitening or breath freshening, while therapeutic mouthrinses contain active ingredients that help prevent dental conditions, such as tooth decay and gum disease. and convert the following expression to deduce the hydrogen ion concentration: Asking for help, clarification, or responding to other answers. In fact, there are many different oral rinse formulas for different oral issues. Epub 2014 Mar 12. $$[\ce{OH-}] = x = 2.42\cdot10^{-6}$$ Cetylpyridinium Chloride | C21H38ClN - PubChem In this work results on theoretical calculations of acid dissociation constants as pKa of pyridine, its N-oxide, and their derivatives were done based on the thermodynamic cycle in water and acetonitrile. The strong acid HClaq has a pH value of 1, use the following equation for a strong acid: \begin{array}{|c|c|c|c|}\hline Define pH in words. Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions.
Except where otherwise noted, data are given for materials in their, "Regioselective Asymmetric Alkynylation of N-Alkyl Pyridiniums", "A predictive model for additions to N-alkyl pyridiniums", Ullmann's Encyclopedia of Industrial Chemistry, https://en.wikipedia.org/w/index.php?title=Pyridinium&oldid=1143314218, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 7 March 2023, at 00:49. Use the product attributes below to configure the comparison table. It is not intended to be a substitute for professional advice, diagnosis or treatment. When the acidic proton is replaced by alkyl, the compounds are called N-alkylpyridinium. How can one calculate the pH of a solution? HCl. Which one to choose?
It is the conjugate acid of pyridine. Atom colors: gray, carbon; white, hydrogen; blue, nitrogen; green,, Schematic depicting the mechanism of action of CPC toward bacterial membranes. 1997 May;46(5):425-9. doi: 10.1099/00222615-46-5-425. eCollection 2019. Susceptibilities of Actinobacillus actinomycetemcomitans biofilms to oral antiseptics. Bethesda, MD 20894, Web Policies Before Suchlike stepwise serial subcultures were made in increasing concentrations of CPC for a period of 6 weeks (for more details, please see reference 53). $$x^2 = 5.87\cdot10^{-12}$$ A: Ammonia reacts with oxygen to form nitrogen monoxide and water. Pyridinium Ionic Liquids | SpringerLink No packages or subscriptions, pay only for the time you need. Calculate the pH of a weak base which dissociates as BOHB++ OH- Federal government websites often end in .gov or .mil. They are prepared by treating pyridine with acids.[3]. HHS Vulnerability Disclosure, Help Mass of water = 20 g The mass of AlOH3 A: We have to predict the volume of base required to reach equivalence point, Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Is this plug ok to install an AC condensor? On this scale, a pH value of 7 is neutral, which means it is n A: Given data : J Phys Chem B. Calculate the pH of a 1.5M solution of hypobromous acid. These two answers are reassuring but also problematic. \end{align}\]. [16] However, after numerous complaints[17] and a federal class-action lawsuit,[6] which was later dismissed,[18] the mouthwash now contains a label warning consumers of its potential to stain teeth.[5]. We can also write two generalized forms of the Henderson-Hasselbalch equation for the two generalized types of weak acid/weak base buffer solutions (the generalized formulas for a weak acid, HA and BH+). Note that this is the Ka reaction for pyridinium. The conjugate base of a strong acid is a_____base. Psciuk BT, Lord RL, Munk BH, Schlegel HB. Accessibility You can also browse global suppliers,vendor,prices,Price,manufacturers of Pyridine hydrochloride(628-13-7). Select Attribute. EC Number: 211-027-4. "Signpost" puzzle from Tatham's collection. vol A: Ans. [citation needed], InChI=1S/C21H38N.ClH/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-16-19-22-20-17-15-18-21-22;/h15,17-18,20-21H,2-14,16,19H2,1H3;1H/q+1;/p-1, InChI=1/C21H38N.ClH/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-16-19-22-20-17-15-18-21-22;/h15,17-18,20-21H,2-14,16,19H2,1H3;1H/q+1;/p-1, Except where otherwise noted, data are given for materials in their, "The effect of cetylpyridinium chloride-containing mouth rinses as adjuncts to toothbrushing on plaque and parameters of gingival inflammation: A systematic review", "Comparative antiplaque and antigingivitis effectiveness of tea tree oil mouthwash and a cetylpyridinium chloride mouthwash: A randomized controlled crossover study", "Consumers spitting mad after mouthwash turns teeth brown", "Mich. lawyer sues, claims mouthwash stained teeth", at least 125 OTC oral healthcare products containing CPC (as of September 2012), FDA monograph on oral antiseptic drug products, National Library of Medicine Toxicology Data Network, "P&G hopes rinse effect won't wash away sales", "Does Crest Pro-Health Rinse stain teeth brown? Note that this is the Kb reaction for chloride. You can also consult your dental professional if you have any questions. Answered: Calculate the pH of a solution that is | bartleby Federal government websites often end in .gov or .mil. Cetylpyridinium chloride (CPC), a quaternary ammonium compound, which was first described in 1939, is one of the most commonly used antiseptics in oral care products and included in a wide range of over-the-counter products such as mouthwashes and dentifrices. & &&\ce{PyH+}\hspace{25px} +\hspace{25px} \ce{H2O} \hspace{25px}\leftrightarrow &&\ce{Py} \hspace{25px} + &&\ce{H3O+}\nonumber\\ A: Given: The https:// ensures that you are connecting to the Atomic number of Argon = 18 Is it safe to publish research papers in cooperation with Russian academics? MICs of CPC were investigated for all strains, and bacteria from the sub-MIC populations were subcultured. Org. FOIA [2][3] It has also been used as an ingredient in certain pesticides. If you're looking for an alcohol-free mouthrinse, one containing CPC may be a good option. [3] In combination with chlorhexidine and zinc lactate, CPC has been found to be effective in treating halitosis. (like NH3 (g)+ H2O(l)NH4OH(aq), where in water NH4OHNH4++ OH-) Although not technically correct, the conjugate acid strength of these cations is similar to the conjugate base strength of the strong acids. Oral Health, Dental Conditions & Treatments. An intermolecular force (or secondary force) is the force that mediates interaction between mol A: To Solve this problem we will use the given data . Pyridine hydrochloride - NIST S. Sowmiah, J. M. S. S. Esperana, L. P. N. Rebelo and C. A. M. Afonso,
", "P&G's Pro-Health rinse draws complaints", "Crest rinse fights off customer complaints", "Effect of salt on the micelles of cetyl pyridinium chloride", "An in vitro evaluation of the availability of cetylpyridinium chloride and chlorhexidine in some commercially available mouthrinse products", https://en.wikipedia.org/w/index.php?title=Cetylpyridinium_chloride&oldid=1137709023, cetyl- means cetyl group, which derives from, This page was last edited on 6 February 2023, at 01:35. The structure of pyridine is shown below and is a base. If you are the author of this article, you do not need to request permission to reproduce figures
To tie it all together, some instructors have students think of Li+, K+, Rb+, Cs+, Ca2+, Sr2+, and Ba2+ as the conjugate acids of the strong bases LiOH, KOH. What does the power set mean in the construction of Von Neumann universe? The Optimal Effective Concentration Combination (OPECC) as a Novel Method for Evaluating the Effects of Binary Application of Antibacterial Compounds.
Pyridine, its N-oxide, and their derivatives are exciting classes of organic bases. Acoustic plug-in not working at home but works at Guitar Center. 2001;51(7):588-95. doi: 10.1055/s-0031-1300084. Round your answer to 1 decimal place. As one of the most common ILs, pyridinium ILs have become a hot topic in synthesis and application. Disclaimer. We will find the pH by looking at the hydrolysis of the conjugate acid. Would you like email updates of new search results? Bookshelf Physical Data: mp 144 C (dec). How to calculate pH of basic salt solution mixed with strong base? 1 CaCO3(s)+ 2 HCl(aq) 1 H2O(l)+ 1 CO2(g)+ 1 CaCl2(aq) You brush, you floss, and you go to regular preventive dental appointments but is there anything else you can do at home to improve your oral health? Copyright Clearance Center request page. The Antibacterial and Antifungal Capacity of Eight Commercially Available Types of Mouthwash against Oral Microorganisms: An In Vitro Study. pH =0 Calculate the pH at 25 C of a 0.91M solution of pyridinium chloride (C,H,NHCI). Ka (HCN) = 4.9 x 10^(-10). Examining the Henderson-Hasselbalch equation also allows us to appreciate from a quantitative sense how buffers are able to control the pH of a solution. LAQV-REQUIMTE, Departamento de Qumica, Faculdade de Cincias e Tecnologia, FCT, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal. That equilibrium will affect the final pH.
Chem. This will make it trickier than usual. The conjugate acid of a weak base is a_____acid. (B) P. aeruginosa toward CPC. Antimicrobial Activity, Biocompatibility and Anti-inflammatory Properties of Cetylpyridinium Chloride-based Mouthwash Containing Sodium Fluoride and Xylitol: An In Vitro Study. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Pyridinium ionic liquids (ILs) are composed of pyridinium cations and inorganic or organic anions (Scheme 1 ). How do I calculate the pH of this buffered solution? 2014 Apr 8;10(4):1500-10. doi: 10.1021/ct400908z. Development and Evaluation of Essential Oil-Based Nanoemulgel Formulation for the Treatment of Oral Bacterial Infections. Looking in the table of values shows a pKa of 5.22. Solution Containing a Conjugate Pair (Buffer) - Chemistry LibreTexts In general, as base strength increases, conjugate acid strength decreases. Unauthorized use of these marks is strictly prohibited. What is the pH of a 0.2 M solution of pyridinium - Questions LLC A: Given equations are: Which is the wrong answer. 2023 Apr 20:1-12. doi: 10.1007/s00784-023-04953-z. PH =, Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer, Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom, Calculate the pH at 25 C of a 0.41M solution of pyridinium chloride (C;H;NHC1). Epub 2012 Sep 13. [13], Cetylpyridinium chloride is known to cause tooth staining in approximately 3 percent of users. Visit ChemicalBook To find more Pyridine hydrochloride(628-13-7) information like chemical properties,Structure,melting point,boiling point,density,molecular formula,molecular weight, physical properties,toxicity information,customs codes. 2Al(OH)3+3H2SO4Al2(SO4)3+6H2O If you look at this equation, you notice that the pH is expressed as a constant (pKa) that then varies by the log of a ratio. Then, from $\mathrm{pOH}$ to $\mathrm{pH}$: 2). Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l)CH3CO2(aq)+H3O+(aq) where Ka = 1.8 105 a. National Library of Medicine government site.
Calculate the pH at 25 C of a 0.41M solution of pyridinium chloride (C;H;NHC1). The mass of ilmenite is = 3.0 kg Alternate Name: pyridine hydrochloride. How to check for #1 being either `d` or `h` with latex3? &\ce{Approximation} &&0.147 &&0.189 &&\ce{x}\nonumber Rearranging gives the final form of the Henderson-Hasselbalch equation: \[\mathrm{pH = pK_a + \log \left(\dfrac{[Py]}{[PyH^+]} \right )}\]. FOIA J.R. S. Front Microbiol. How to combine independent probability distributions? If you are an author contributing to an RSC publication, you do not need to request permission
Its salts are often insoluble in the organic solvent, so precipitation of the pyridinium leaving group complex is an indication of the progress of the reaction. Calculate the pH of a solution that is 0.147 M in pyridine and 0.189 M in pyridinium chloride. The aim of the present review is to summarize the current literature on CPC, particularly focusing on its mechanism of action, its antimicrobial efficacy toward biofilms, and on potential risks of resistance toward this antiseptic as well as underlying mechanisms. Take the square root of both sides: Use these concentrations to find the mass of the two chemical species in this sample 103g solution 0.800 g C5H5N 100g solution = 8.00 g C5H5N Form Supplied in: white hygroscopic crystalline solid. Choose an expert and meet online. Calculate the pH of a 0.43 M pyridinium chloride (C5H5NHCl) solution Round your answer to 1 decimal place. Schematic illustration of the broth microdilution method for investigating phenotypic adaptation of bacteria upon repeated exposure to antiseptics like CPC. 1L 103mL 1L = 103mL Now, this sample will have a mass of 103mL 1 g 1mL = 103g The solution is said to be 0.800 % by mass pyridine and 0.990% by mass pyridinium chloride. answered 03/15/21, Ph.D. University Professor with 10+ years Tutoring Experience. How would you use the Henderson-Hasselbalch equation to - Socratic However, we must first check the approximation before calculating the pH. Which one is actually correct? \[\ce{Py + H2O \leftrightarrow PyH+ + OH-}\], The structure of pyridinium chloride is shown below. Then, we can compare the reactants and note that $\ce{C5H5NH+}$ has a greater acid strength than the base strength of $\ce{F-}$ (ie $\mathrm{K_a} $ of $\ce{C5H5NH+} >\mathrm{K_b} \text{ of } \ce{F-} $) so the solution will be acidic. Calculate the pH of 1.1 M C3H7COOH(aq) given that its Ka= 1.510-5.Provide your answer in decimal notation rounded to 2decimaldigits. \[\mathrm{K_b = \dfrac{[PyH^+][OH^-]}{[Py]} = \dfrac{(0.189)(x)}{0.147} = 1.66\times10^{-9}}\], \[\mathrm{x = [OH^-] = 1.29\times10^{-9}}\]. First week only $4.99! 35,000 worksheets, games, and lesson plans, Marketplace for millions of educator-created resources, Spanish-English dictionary, translator, and learning, Diccionario ingls-espaol, traductor y sitio de aprendizaje, a Question Anilinium chloride | C6H8ClN | ChemSpider How to calculate the pH value of a Carbonate solution? &\ce{Equilibrium} &&0.147 - \ce{x} &&0.189+\ce{x} && \ce{x}\nonumber\\ is a weak base with a p K, of 8.77. E-mail:
Here's my work, but it's wrong (at least I tried): C X 5 H X 5 N H F C X 5 H X 5 N H X + + F X K a ( H F) = 4.0 10 4 K = K w K a K = 1 10 14 4.0 10 4 = 2.5 10 11 Construct an ice table: b. Cetylpyridinium Chloride | C21H38ClN | CID 31239 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological . CPC; adaptation; antiseptic; biocide; cetylpyridinium chloride; oral; resistance. J Phys Chem A. This article is intended to promote understanding of and knowledge about general oral health topics. \end{array} Did the drapes in old theatres actually say "ASBESTOS" on them? What is important to realize that we get the same pH (5.11) using either the Ka or Kb equation. Calculate the pH of a 10 M C5H5NHCl (aq) (pyridine chloride salt of pyridine) at 25 C. The way to assess that is to examine the relative values of Ka for the conjugate acid and Kb for the conjugate base. What is the initial molar concentration of C5H5N, if its base ionization constant is: Kb = 1.7109? Unable to load your collection due to an error, Unable to load your delegates due to an error. \text{E}&\pu{0.325M}-x&&x&x\\\hline Pyridine 98 628-13-7 - Sigma-Aldrich Round your answer to1decimal place. The dihedral angle formed between the alkyl chain and the pyridinium ring is 78.29(20), slightly less than the 79.16seen in 1-dodecylpyridinium chloride monohydrate [10], and different to the . (A) The bacterial cytoplasmic membrane, composed of proteins embedded into a phospholipid bilayer, carries a negative charge neutralized by Ca, Scanning electron microscopic (SEM) visualization of an. Why do conjugate bases of strong acids have no basic properties in water? PMC da Repblica, 2780-157 Oeiras, Portugal, b
You didn't take into account the ionization of $\ce{C5H5NH^{+}}$ anywhere. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. At last,Pyridine hydrochloride(628-13-7) safety . On what basis are pardoning decisions made by presidents or governors when exercising their pardoning power? Embedded hyperlinks in a thesis or research paper. J Chem Theory Comput. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak gives you weak). Kb = [OH-] [OH-]= [OH-]^2 = (1.49.10^-5)2=0.171.10^-9 . The chemical formula is as follows: Acidity Containing a pyridinium ion, pyridinium chloride has a pK a of approximately 5, slightly more acidic than that of typical amines. [4] They are isoelectronic with benzene. (Select up to 3 total.) EWG Skin Deep | What is LAURYLPYRIDINIUM CHLORIDE Some products are formulated instead with the bromide salt cetylpyridinium bromide, the properties of which are virtually identical. $$2.5\cdot10^{-11} = \frac{x^2}{0.325-x}$$ But one reaction has pyridine acting as a base, another pyridinium acting as an acid. A link to the app was sent to your phone. molarity of HCl = 0.100 M Int J Mol Sci. (A) The, Scanning electron microscopic (SEM) visualization, Scanning electron microscopic (SEM) visualization of an in vitro polymicrobial biofilm comprising A., Schematic illustration of the broth microdilution method for investigating phenotypic adaptation of bacteria, Phenotypic adaptation. 2012 Dec 11;8(12):5107-23. doi: 10.1021/ct300550x. (A) Forty-eight-well plates with planktonic bacterial cultures in nutrient broth or in serial 2-fold dilutions of antiseptic in nutrient broth, respectively. in a third-party publication (excluding your thesis/dissertation for which permission is not required)
Preparative Methods: precipitates as a 98% yield of 99.8% pure white crystals when Hydrogen Chloride gas is passed through a solution of Pyridine in ether . 2023 Mar 30;12(4):675. doi: 10.3390/antibiotics12040675. (PDF) 1-Dodecylpyridinium Chloride Monohydrate - ResearchGate Pyridine hydrochloride - Pyridinium chloride - Sigma-Aldrich Looking at the answers, you may need to solve the quadratic but I should point out that the answers are given to 4 significant figures and Kb is known only to 2 s.f. Legal. Earlier we said that a buffer is effective at controlling the pH because the acid form of the conjugate pair can neutralize bases and the base form can neutralize acids. The cyanide ion and pyridinium salts form equilibrium mixtures containing labile 1,4-dihydropyridine adducts 1 (Scheme 1) [13, 14]. Calculate the Ka of propanoic acid. These compounds show widespread biological activity, and they are often used in synthesis. For some patients, using mouthrinse may provide additional oral health benefits. This may help a patient reduce their chances of developing gingivitis (gum inflammation and bleeding) and ultimately improve their overall oral hygiene. However, if you consider that we ignored the initial amount of hydroxide present from the autoprotolysis of water (10-7 M), this would seem to be in error because of the low level of hydroxide (1.29\(\times\)10-9 M). [14] The Crest brand has noted that this staining is actually an indication that the product is working as intended, as the stains are a result of bacteria dying on the teeth. { "01_Solution_of_a_Weak_Base" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.
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