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  1. 5.30
    Pyridine is protonated by reaction with acids and forms a positively charged aromatic polyatomic ion called a pyridinium cation. This cation is the conjugate acid of pyridine and its pKa has a value of 5.30.

    Pyridine - New World Encyclopedia

    www.newworldencyclopedia.org/entry/Pyridine
    Containing a pyridinium ion, pyridinium chloride has a pK a of approximately 5, slightly more acidic than that of typical amines.

    Pyridinium chloride - Wikipedia

    en.wikipedia.org/wiki/Pyridinium_chloride
    The pKa of the conjugate corrosive (the pyridinium cation) is 5.25.

    Pyridine - Structure, Properties, Uses, Exa…

    www.vedantu.com/chemistry/pyridine
  2. People also ask
    What is PKA in chemistry?
    pKa is an acid dissociation constant used to describe the acidity of a particular molecule. Its value is directly related to the structure of the given compound.

    Bordwell pKa Table - Organic Chemistry Data

    organicchemistrydata.org
    What effect does PKU have on the body?

    Dr. Ramamurthy Bangalore

    M.D., F.C.C.P., F.A.C.P., F.A.A.S.M. (Pulmonologist) · 30 years of exp

    Untreated PKU can cause irreversible brain damage and significant intellectual handicap in the first few months of birth. Seizures and tremors are examples of neurological abnormalities. Behavioral, emotional, and social issues in older children and adults.
    2 more answers
    bing.com
    What is a pKa table?
    The resulting data is often compiled into a pKa table, like the one below. The table is organised into columns of compounds. On each compound, there is a hydrogen colored in blue. The pK a value listed next to the compound is an index of how tightly that hydrogen is held by the compound. The bigger the pK a, the more tightly that proton is held.

    1.7: Equilibrium and pKa - Chemistry LibreTexts

    chem.libretexts.org
    What are common symptoms of phenylketonuria (PKU)?

    Dr. Howard E. LeWine

    M.D. Chief Medical Editor, Harvard Health Publishing · 40 years of exp

    Almost all cases of phenylketonuria (PKU) are diagnosed by newborn screening. If not detected and not treated with dietary restriction of phenylalanine, the baby’s brain will not develop normally, leading to cognitive impairment, behavioral problems, risk of seizures and skin changes.
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    https://en.wikipedia.org/wiki/Pyridinium

    Pyridinium - Wikipedia

    Pyridinium refers to the cation [C5H5NH] . It is the conjugate acid of pyridine. Many related cations are known involving substituted pyridines, e.g. picolines, lutidines, collidines. They are prepared by treating pyridine with acids. As pyridine is often used as an organic base in chemical reactions, pyridinium salts are … See more

    N-Alkylpyridinium cations

    When the acidic proton is replaced by alkyl, the compounds are called N-alkylpyridinium. A simple representative is N-methylpyridinium ([C5H5NCH3] ). These pyridinium … See more

    See also

    • Pyridinium chlorochromate
    • Pyridinium chloride See more

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    N-Alkylpyridinium cations
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  4. Chemistry Stack Exchange
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    pKaH of pyridine versus other imines - Chemistry Stack …

    Typically, imines have a pKa between 5 and 7, so this seems unusually high for a start. If this number is wrong then it means that pyridine may have quite a typical pKa for a cyclic imine of this type.

    How to calculate the pH of a 0.325 M solution of pyridine hydrofloride?May 31, 2015
    acid base - What is the pKaH of pyrrole? - Chemistry Stack ...
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    Pyridinium Ion
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    2 Pyridone Pka
    Iminium Pka

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  6. Chemistry LibreTexts
    https://chem.libretexts.org/Bookshelves/…

    1.7: Equilibrium and pKa - Chemistry LibreTexts

    The ethane thiol has a higher pK a than the pyridinium ion, so it will keep its proton, not give it away. However, the difference between the numbers isn't that large. Maybe there will be a measurable equilibrium, meaning an equilibrium …

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    Pka Equation
    Pyridinium Cation Pka
    Pyridinium Ion
    Equilibrium and Pka
  7. Organic Chemistry Data & Info
    https://organicchemistrydata.org/hansreich/...
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    pKa Values INDEX - Organic Chemistry Data

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    Pyridine Pka
    Pka Values
  8. PubMed
    https://pubmed.ncbi.nlm.nih.gov/31856569

    Calculations of p Ka Values of Selected Pyridinium and Its N

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    Pyridinium Chloride
    Ka Value of Pyridinium
    Pyridinium Ion Pka Meannig
  9. mnstate.edu
    https://web.mnstate.edu/marasing/CHEM480/labls/LABS...
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    Determination of pKa with NMR - Minnesota State University …

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    Pka Equation
    Pyridinium Cation Pka
    Nuclear magnetic resonance spectroscopy
  10. Chemistry LibreTexts
    https://chem.libretexts.org/Bookshelves/Analytical...

    Solution Containing a Conjugate Pair (Buffer ... - Chemistry …

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    Pyridinium Chloride
    Buffer solution
  11. Organic Chemistry Data & Info
    https://organicchemistrydata.org/.../reso…

    Bordwell pKa Table - Organic Chemistry Data

    Oct 27, 2017 · This page by Professor Hans Reich (UW-Madison) provides a collection of common structural motifs in Organic Chemistry and their corresponding pKa values.

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    Pka Equation
    Pka Values
    Aniline Pka
    Bordwell Pka Table
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