7. Given the pKa information for different acids below, place the following acids in order of increasing acid strength (from weakest to strongest). Anilinium ion, CsH&N*, pKa = 4.60 Benzilic acid, pKa = 3.09 Chloroacetic acid, pKa 2.98 Dibromophenol, pKa = 8.06 a) Anilinium ion Benzilic acid → Chloroacetic acid → Chloroacetic acid b) Dibromophenol → Chloroacetic acid → Benzilic acid Anilinium ion c) Chloroacetic acid > Benzilic acid → Anilinium ion → Dibromophenol d) Dibromophenol → Anilinium ion Benzilic acid → Chloroacetic acid e) Chloroacetic acid > Anilinium ion Dibromophenol → Benzilic acid f) none of the above

What is the pKa value of molecule C? OH soni +

Would you please help me work through this problem? Attached below is a screenshot.  Thank you!

Assuming that base (B:) and acid (AH) are mixed in equal concentrațions and using pka values of acid AH 3.7 and pka value of conjugate acid for the base BH 4.9 calculate what percent of BH will appear in this reaction once the equilibrium is reached. Answer is numerical. Round the answer to the nearest whole number. Don't write % symbol in the answer.

Calculate the Ka for the weak acid knowing the pKa value is 13.07

Conjugate acid base 2) Consider the reaction B:(-) + H3O+ → BH(+) + H2O. For the following named bases: 1) draw the structure of the base, 2) draw the structure of the conjugate acid, 3) give the name of the conjugate acid, and 4) give the approximate pKa of the conjugate acid (±1 pKa unit). For the purposes of answering this question you may use pKa values evenly divisible by 5. Benzoate anion Cyclopentadienide anion Diethyl amine Diethylamide anion pKa pKa pKa pKa

Q16. Identify the two acid/conjugate base and base/conjugate acid pairs in the following acid/base reaction: ] Using Evan's pKa table, assign a pka value to the acid and conjugate acid species on the opposite side of the reaction arrow. Use the assigned pka values to predict if the preferred direction for this reaction is forward or backwards. Et;N or + + MeO OMe Et,NH MeO OMe

Conjugate base acid Iso-Butyronitrile pka_ → 1) Consider the reaction AH(+) + H₂O A:+H3O+. For the following named acids: 1) draw the structure of the acid, 2) give the approximate pKa of the conjugate acid (±1 pKa unit), 3) give the name of the conjugate base, and 4) draw the structure of the conjugate base. For the purposes of answering this question you may use pKa values evenly divisible by 5. N-methylimidazolium cation pka_ Triethyl phosphonoacetate pKa _ acid N-Ethylcarbamic pka_

The following molecule with pKa values shown, is an important antibiotic. At pH =11, which pair of species will be most prominent in solution. Choose the correct pair from those shown in boxes A, B, C and D. (Note: In red, the proton/protons removed/added between the two states is highlighted) + H₂N H₂N A A B с .H pka 10 H₂N + H₂N H₂N B NH ΝΗ N- OH H pka ~5 OH pka ~4 + H₂N HN ho NH + H₂N HN ongs. D O

Which statement about the pKa value is false?        The pKa value is calculated from the equilibrium constant for the dissociation of the acid.       The pKa value is a measure of the strength of an acid.       The pKa value of a given acid gives an indication of the strength of the conjugate base of that acid.       A larger pKa value indicates a stronger acid and a weaker associated conjugate base.       All of these statements are correct.