Aratilis contains the compound gallic acid (H2GA). An equilibrium between its forms, H2GA and GA2- exists at pH = 8.   Which of the following is/are the dominant species upon addition of excess acid? Select one: H2GA H3O+ Both H2GA and GA2- GA2-

Q: The measured pH of a 0.100 M solution of triethylamine (NEt3) is 11.68. What pKa of triethylammonium…

A: Given,molarity of triethylamine ( NEt3 ) = 0.100 MpH of the solution = 11.68

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: What fraction of iminodiacetic acid is in each of its four forms (H, A H,A, HA, A) at pH 3.357? The…

A: pH=3.35=-log [H+]or, [H+]=10-3.35=4.47×10-4

Q: solution of 0.138 M aspartic acid, the charge neutral form of the amino acid, is titrated with…

A: In an acid - base titration, there is a 1:1 acid base stoichiometry, so the equivalence point where…

Q: An analytical chemist is titrating 131.8 mL of a 0.7000M solution of propylamine (C3H-NH₂) with a…

A: Given data :

Q: Given the reactions HF(aq) ⇌ H+(aq) + F-(aq)    Kc = 6.9 x 10-4 H2C2O4(aq) ⇌ 2 H+(aq) + C2O42 - (aq)…

A: Ksp is equal to the product of solubilities of the consitituent ions raised to the power equal to…

Q: What's the difference between Al2O3+2NaOH+3H2O→2NaAl(OH)4 and Al2O3+2NaOH→2NaAlO2+H2O? And what's…

A: Solution :     Stoichiometry in Chemistry represents the quantitative relationship between the…

Q: Write a net ionic equation to show that isoquinoline, C,H¬N, behaves as a Bronsted-Lowry base in…

A:

Q: 2. 1 M valine is present in 1 liter of water at (a) pH 7.5, (b) pH 2.5. For each functional group,…

A: Valine is a nonpolar amino acid with the uncharged structure shown below:

Q: hat molar ratio of to H in solution would produce a pri Phosphoric acid BPO4), a triprotic acid, has…

A: Here the answer is 1.38

Q: Answer the following problem and show your detailed solution and explanation. The tripeptide…

A:

Q: (2) A 100.00-mL sample of 0.2000M glycine, A+ form (see structure below), was titrated with 0.2000M…

A: We have find out the answer.

Q: Sketch a titration curve of the amino acid isoleucine with pH on the y-axis and volume of titrant on…

A: Let the titrant added be NaOH (in mL) which is plotted on the x-axis and the pH on the y-axis.…

Q: 4b) Canavanine is closely related to arginine, and like arginine its side group has a +1 charge when…

A: Canavanine has a similar structure of Arginine.  Hence Canavanine has 3 groups that can be…

Q: Part 1) Would you expect the pKa values of the two carboxyl groups to be the same? Explain your…

A: A molecule that can furnish one proton in aqueous solution is a diprotic acid. Some examples are…

Q: Calculate the pH at25°C of a 0.37M solution of sodium propionate NaC2H5CO2. Note that propionic acid…

A: we have to calculate the pH of sodium propionate

Q: 9. Phosphotyrosine (shown below) has four ionizable functional groups (pK1 = 2.5, pKR1 = 2.1, pKr2 =…

A: a) Given is the phosphotyrosine molecule, with four ionizable groups.

Q: Determine the predominant forms of (S)-phenylalanine as it exists at pH 1, pH 7.4 (blood pH) and at…

A: We know if the pH is greater than pka, then deprotonation occurs and it exists in deprotonated form.…

Q: Given the following two equilibria: NiCO3(s) Ni²+ (aq) + CO32-(aq) HCO3(aq) + H₂O(l) — CO3²-(aq) +…

A: To solve this problem we have to calculate the equilibrium constant.

Q: You are an organic chemist and given a solid mixture of these two compounds. You need to isolate the…

A: Given:

Q: 6. Carbonic acid (H2CO3) has two ionizable protons, with pKa around 6.1 and 10.2. (a) Which species…

A:

Q: In the preparation of the benzoic acid ( pKa 4.2) and in order to precipitate all of the benzoic…

A: In the given reaction, we have benzoic acid (C6H5COOH) on reactant side and benzoate ion (C6H5COO-)…

Q: Which of the following are produced when an unknown sample is heated with concentrated sulfuric acid…

A: 1. When sample is heated with conc. sulfuric acid nitrogen dioxide or NO2 is produced.…

Q: The amount of ascorbicacid ,in aorange juice was determined by oxidzing the ascorbic acid to…

A: Given: 13.72 mL of 0.07203 M Na2S2O3 was required to reach end point. moles of Na2S2O3 = 13.72 ×…

Q: nsider a ternary (three-component) system of amphiphile, hydrocarbon, and water. What structure do…

A:

Q: A solution of 0.148 M aspartic acid, the charge neutral form of the amino acid, is titrated with…

A: The given scenario involves a titration experiment in which a solution of aspartic acid (an amino…

Q: 1. Which of the following is the well known Henderson-Halsselbalch equation?. Group of answer…

A: Generally, the pH of a solution can be calculated as: pH = -log[H+] The chemical reaction taking…

Q: How might the structure of the triphenylmethyl group be modified to increase or decrease its acid…

A: Increasing and decreasing acid sensitivity of triphenylmethyl group. Draw the triphenylmethyl cation…

Q: The value of K₂1 and Ka2 for ascorbic acid (H₂CH₂O) are 7.90×10-5 and 1.60×10-12, respectively. al…

A: Consider a diprotic acid H2X , it will dissociate in two steps: H2X + H2O <----> HX-  +  H3O+…

Q: 3. Two unlabelled solutions are at pH = 2.0 and pH = 4.0. Becky does not know which one is which. In…

A: Methyl orange and Bromocresol green both are indicators to determine which solution is acidic and…

Q: The state of ionization of a specific amino acid is directly influenced by the pH of the surrounding…

A: The state of ionization depends upon the pH of  the medium. Lysine is a basic amino acid having two…

Q: Choose any amino acid and show, by diagrams of your own creation, how pH will modify the charge…

A:

Q: 11 of 48 This reaction must have a AG>0 at SATP: 2Li(s)+Cl2(g)→2LİCI(s) NHẠC(s)¬NH3(g)+HCI(g)…

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: Draw the amino acid proline with the biologically preferred stereochemistry and ionization state at…

A: An amino acid are molecule which has acid COOH and basic NH2 group . Thus it is  amphoteric in…

Q: Calculate the pH of a 2.00 M Na2CO3 given that the pKa’s of the first and second dissociation of…

A: The pH for the solution of 2.00 M Na2CO3 is to be calculated. Given: pKa1 = 6.37 pKa2 = 10.32.…

Q: Methionine is one of amino acids and undergoes dissociate reactions as follows: H₂M HM + H+ Ka1 =…

A:

Q: The pka values of 4 acids are given below. Acid НА1 НА2 НАЗ НА4 pKa 4.76 3.45 7.63 5.23 Which of the…

A: More is the value of pKa weaker is the acid ,and vice versa.

Q: Draw the structure of the most abundant form of histidine in solutions whose pH values are 1, 3, 5,…

A: Histidine falls under the category of essential amino acid; it is mandatory to incorporate this…

Q: Based on the concept of hard/soft acids and bases, will the products, or reactants be favoured in e…

A: the reaction is given and we have to tell the direction of reaction.

Q: Draw the structure of the predominant form of pyridoxal-5-phosphate at pH 7.00.

A: At pH 7: The protons present in the molecule which are easily ionizable or have a greater acidity or…

Q: OH 1. CO2, aq. NAOH 2. H30+

A: This is Kolbe Schmidt reaction to convert phenol into Salicylic acid

Q: Calculate the Ka and Kb values for 1.0 M NaHSO4 and Na2CO3

A: Answers are explained below.

Q: Conjugate acid base 2) Consider the reaction B:(-) + H3O+ → BH(+) + H2O. For the following named…

A: The detailed solution (structure of base , Structure of Conjugate acid , pKa , name of the conjugate…