Consider the following five weak acids: Succinic acid:  pKa = 4.16HOBr:  Ka = 2.06 x 10-9Dinicotinic:  pKa = 2.08Nitrobenzoic:  Ka = 6.95 x 10-3Saccharin:  pKa = 11.68 Order these acids from the strongest (1) to the weakest (5)

Q: At pH 7.4, the pH of blood plasma, do the majority of protein-derived amino acids bear a net…

A: Concept introduction: Isoelectric point (pI) is defined as pH at which the protein has no net…

Q: Citrus fruits are rich in citric acid, a compound with three COOH groups. Explain the following:a.…

A: (a) The reason why value of first pKa is lesser than pKa of acetic acid has to be explained.

Q: (12) Calculate the pK, of dichloroacetate. Formulate the base association equilibrium for…

A: For the aqueous solution, we know that the product of the acid dissociation constant and the base…

Q: #9 Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar. A- Leucine,…

A: Answer  Classify these amino acids as acidic, basic neutral polar or neutral non polar

Q: What is the net charge on the protein shown below (without pH considerations) at pH 12? a. -2 b.…

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Q: Calculate the pH of a 0.35 M solution of hydrocyanic acid (HCN), which has a pKa of 9.31. Your…

A: Given, Concentration of HCN, [HCN]= 0.35 M pKa of HCN is 9.31 So, Ka = 10-pKa = 10-9.31 =4.90×10-10…

Q: Consider 0.2 M H2A (Given Ka1= 1x10^-5 , Ka2=1x10^-9). Calculate the Concentration of HA^- at pH =

A: We have to  calculate the Concentration of HA^-

Q: If the pKa of an organic molecule is 8, it's buffering range is around pH     7-8     8…

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Q: Tyrosine, Tyr, Y coot 1 8P + PO - соо H₂N-C-HH3N"-"C-H = H₂N-C-H CH₂ 1 CH₂ PH-Pha= 2.20 OH (+1) CONS…

A: The isoelectric point of an amino acid is the pH at which the amino acid has a neural charge...

Q: Consider 0.2 M H2A (Given Ka1= 1x10^-5, Ka2=1x10^-9). Calculate the Concentration of HA^- at pH =5…

A: We know strong acid are those acid which dissociate 100% while weak acid are those which does not…

Q: (0. An amino acid has an -OH side chain. What type of side chain could form hydrogen bonds with this…

A: Given : Amino acid has an -OH side chain.

Q: Which of the following will have the highest pKa? A. Co,?. B, HCO31 C. H2CO3 D. H2SO3 E. HCIO3

A: Acid is substance which release hydrogen ions. Weak acid has strong conjugate base and weak base has…

Q: The amino acid histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, COOH H₂N-CH CH…

A: GIVEN The pKa1, pKa2 and pKa3 values of Histidine are given as 1.8, 6.0 and 9.2. Initial pH of…

Q: The amino acid side chains of 17 of the 20 most common amino acids are shown below. Which side chain…

A: Those amino acids which -CIIO-OH group in side chain act as acidic.Aromatic amino group means cyclic…

Q: 3) Nicotinic Acid: HNIC + H* + Nic hydrophobic Ka = 1.4x105 %3D water soluble At what pH is…

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Q: What is the pKa of a weak acid with a Ka of 4.7 X 10-6?

A:

Q: 3. In the space provided, draw the structure of Glycine (Gly) at the following pH value. Glycine has…

A: Answer:- This question is answered by using the simple concept of writing the structure of an amino…

Q: Alanine (HA) is a diprotic amino acid with K,1 = 4.53 x 10 and Kg = 1.36 x 10-10. Determine the pli…

A:

Q: Valproic acid is a drug treating epilepsy with a pKa around 4.5. Considering in the stomach…

A: Given:- Valproic acid is a drug treating epilepsy with a pKa around 4.5. Considering in the stomach…

Q: Proteins are complex biological molecules made of smaller molecules called amino acids. Five common…

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Q: 22. Which hydrogen (shown) in the following molecule is most acidic? HO HO. H. a 23. Which of the…

A:

Q: Phenylalanine is a diprotic acid with pKå = 2.20 for the carboxylic acid group and pKå = 9.31 for…

A: Solution: Phenylalanine is act as diprotic acid when amino group is protonated. So below isoeletric…

Q: A weak acid has a pKa of 7.6. What is the proportion of A- to HA if pH is 9.08?  Round to one…

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Q: A) R-CH-COOH ONH3 B) R-CH-COO ONH3 C) R-CH-COOH NH2 D) R-CH-COO NH2 E) R-CH-COO ONH2

A: We have to predict correct structure at pH of 11.

Q: Calculate the pH of a 0.12 M solution of hydrocyanic acid (HCN), which has a pKa of 9.31.

A:

Q: given weak acid has a pka of 7.83. Calculate the percent ionized in .34M of the weak acid

A: Given acid is weak so we will use concept of weak acid. Percent ionisation=√ka×C

Q: Water has a pKa of 15.7. Methane has a pKa of 48. Hydrofluoric acid has a pKa of 3.2. Acetic acid…

A:

Q: Question 2 Which of the following statements are FALSE? Multiple answers: Multiple answers are…

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Q: Both mepivacaine and bupivacaine are local anesthetics used in epidural blocks. Mepivacaine has a…

A: Since more the value of Ka , more will be the dissociation of the acids  Hence more will be the…

Q: At 25 °C, what is the value of Kb for the cyanide anion, CN? Ka(HCN) = 6.2 × 10-10 O 1.6 x 10-4 O…

A: The question is based on the concept of EQUILIBRIUM. We have been given Kb value. We need to…

Q: Classify each of the amino acids below. Note for advanced students: none of these amino acids are…

A: Non-Polar Amino Acids are those amino acids in which side chains contains mostly hydrocarbon. Like…

Q: H2N CH C OH CH2 CH2 CH2 NH CENH NH2

A: Amino acids are organic compounds containing amine and carboxyl functional groups and each amino…

Q: a. Neutral/ non-polar/ acidic/ basic H2N ÇH COH CH OH CH3

A: Amino acids are classified mainly as polar, non-polar, acidic, basic. An amino acid is said to be…

Q: Erythromycin is a weak base with a pka of= 5.2 What will be the ionisation state of the drug in…

A: Actually Erythromycin is a weak base with pKb = 5.2  Hence pKa = 14 - pKb = 14 - 5.2 = 8.8  The…

Q: Identify the strongest acid. Ka 1.29 x10^-3 (tartaric acid, a component of grapes) O pka = 3.86…

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Q: Dimethylamine (CH3)2NH is a weak base with a pKa of 11.0 Calculate the pH of a solution of…

A:

Q: Citric acid ( H3C6H507 ) has pKa values of 3.128 ( pKa1 ), 4.761 ( pKa2 ), and 6.396 ( pKa3 ). What…

A: Citric acid has pKa values as 3.128(pKa1) , 4.761(pKa2) and 6.396 ( pKa3).

Q: Ibuprofen is a weak acid with a pK, of 4.9 (structure is shown with the ionizable hydrogen marked…

A: The correct option is:

Q: Which of the following explains why alpha-amino acids, the building blocks of proteins, are nearly…

A: Strong acids are those in which the conjugate base of this acid is stable. As amino are stronger…

Q: What is the [A-]/[HA] concentration ratio required to obtain a pH 5.3, given that the pka of HA is…

A: The pH of a buffer (HA/A-) is determined using Henderson-Hasselbalch equation- pH = pKa +…

Q: Which buffer(s) would give the amino acid tyrosine an overall negative charge? Select all that are…

A: Amino acids have an amino group as well as a carboxylic acid functional group. In acidic medium, the…

Q: 2. In the space provided, draw the structure of isoleucine at each of the following pH values.…

A: •Given ISOLEUCINE has pI of 6.02 ,here pI means ISOELCTRIC POINT. •So isoelectric point of…

Q: Crotonic acid is an organic weak acid. has a pka = 4.69 What is the Ka of Crotonic acid?

A: Given :- pKa for crotonic acid = 4.69  To calculate :- value of Ka

Q: Sulphuric acid (H2SO4) has a PKa of -3. a) Write an equation showing how sulphuric acid can act as…

A: Given that pKa of sulphuric acid is - 3. We need to find Ka value.

Q: Lactic acid (HC3H5O3) has one acidic hydrogen.  A 0.10 M solution of lactic acid has a pH of 2.44…

A: Formula used :- . pH = -log[H+] . Ka =  [Product]/[Reactant]

Q: Given a solution of 0.0025 M HC2H3O2, Ka = 1.8 x 10^-5 a. Calculate the pH of the solution. b.…

A: The question is based on the concept of equilibrium. we have to calculate the pH of the acetic acid…

Q: Calculate the pH of a 0.24 M solution of sodium lactate. The pKa of lactic acid is 3.86.

A: Sodium lactate is the salt of strong base and weak acid. Its solution will be basic in nature.

Q: Calculate the pH and the equilibrium concentration of C6H6O62- in a 6.39×10-2 M ascorbic acid…

A:

Q: If I have a weak acid with a pKa of 4.65 what will be the relative ratio of [A-] to [HA] in the…

A: pKa of weak acid = 4.65 pH of acid = 4.00 The Relative ratio of [A-] to [HA] for a pH of 4.00 is to…

Q: Given the following information determine which of these acids is the strongest? Ka for boric acid…

A: Given : Ka and pKa values for some of the Compounds are given  To find : strongest acid  Solution :…

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.