The pka values of a compound with two ionizable groups are pk1 = 4.10 and pk2 between 7 and 10. A biochemist has 10 ml of a 1.0 M solution of this compound at a pH of 8.00. She adds 10.0 ml of 1.00 M HCI, which changes the pH to 3.20. What is pK2? Group of answer choices 8.1 8.9 10.4 9.7

Q: acid/conjugate base systems shown below. Conjugate Weak Acid pKa Base C,0,- HPO, HC,04 6.4x105 4.19…

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A: We have find out Pka of solution of an unknown monoprotic acid that has a pH of 4.2

Q: The following observations are made about a diprotic acid H2A: (i) A 0.10 M solution of H2A has…

A: pH of a 0.10 M solution of H2A is 3.10 and 0.10 M solution of a salt NaHA is acidic.

Q: 10.00 mL sample of 1.20 M HNO2 (analyte) (pKa = 3.34 and Ka = 4.57x10-4) is titrated with 1.20 M…

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Q: The pH of an aqueous solution of weak monoprotic acid is 3.15. What is the initial…

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Q: that is 0.192 M in lactic acid and 0.155 M in sodium lactate? The Kaof lactic acid is 1.4 × 10-4.…

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Q: What is the pH of a buffer that results when 5.46 mole of H3PO4 is mixed with 2.97 mole of NaOH and…

A: · Moles of H3PO4 = 5.46 mol· Moles NaOH = 2.97 mol· Volume of solution = 1.00 L· Ka1 = 7.5 × 10–3

Q: What is the pH of a 250.0 mL solution that contains 3.17 g of potassium monohydrogen phosphate and…

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Q: In H2PO4- + H2O -> HPO4- + H3O+ , the pKa = 7.2. A student wants to make a buffer with pH 7.2. With…

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Q: A 0.10 M solution of a weak monoprotic acid has the solution pH = 3.10. What is the pKa for this…

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Q: The following is list of weak acids and their pka values weak acid „pKa benzoic acid 4.20 hydrogen…

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Q: A chemist has synthesized a monoprotic weak acid and wants to determine its pKa value. To do so,…

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Q: A monoprotic weak acid (HA) has a pKa value of 3.493. Calculate the fraction of HA in each of its…

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Q: a. Calculation of the pH of a Solution of a Polyprotic Acid Histidine has ionizable groups with pKa…

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Q: You need to make 2.0 L of 0.200 M sodium phosphate buffer, pH 6.2. Using the stated pKa values for…

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Q: 2. solution of diprotic acid with molar mass 186.0 g/mol (Ka1= 7.1e-2 Ka2=6.1e-5) made by placing…

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Q: A titration of 100.0 mL of 1.00 M malonic acid (H2A) was done with 1.00 M NaOH. For malonic acid,…

A: Answer -

Q: 1. When making a buffer of pH = 10, weak molecules with the following Ka values are available.…

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Q: 3.Tris(hydroxymethyl)aminomethane [(HOCH2)3CNH2-Tris or THAM] is a weak base frequently used to…

A: Given: Kb=1.2×10-6pKb= 5.92pKa=8.08 Volume of HCl= 100mL Concentration of HCl= 0.50M pH of buffer=…

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Q: Calculate the pH of a buffer solution that prepared by dissolving 0.025 mole of CH3COOK and 0.020…

A: To calculate the pH of buffer solution use formula which is given below. pH=pKa+log[Salt][Acid] Here…

Q: What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of…

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Q: Derive the titration curve when titrating 100.0mL of 0.100M weak base aniline (pka = 4.601) with…

A:

Q: 6. If 25.1 mL of 0.109M acid with a pKa of 5.27 is titrated with 0.108 M NaOH solution, what is the…

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Q: What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of…

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Q: 3. Calculate the pH of the 0.02M 2-aminophenol ampholyte considering that 2-aminophenol has pka1 =…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A 0.0250 M Ca(X)2 has a pH of 8.049. Ca(X)2 is composed of a Ca2+ cation and an unknown anion X-,…

A: Given,  Molarity of Ca(X)2 = 0.0250 M. and it has pH = 8.049. The Kb or Kh of X- is:

Q: Which of the following weak acids when paired with its conjugate base would be the best choice for a…

A: Given group of answer choices : a). HClO: pKa = 7.54 b). C5H4NH+: pKa = 5.25 c). HNO2: pKa =…

Q: The pH of a solution containing 0.010 M lactic acid and 0.087 M lactate is 4.80. Calculate the pKa…

A: Given:Concentration of lactic acid = 0.010 M Concentration of lactate = 0.087 M  pH of the solution…

Q: I have 3 moles of a monoprotonated base (there are four pKa values(pKa1=2.3, pKa2=4.6,pKa3=10.1,…

A: The chemical reaction for the monoprotonated base can be given as follows: HCl+B-→HB+Cl-;…

Q: A monoprotic weak acid (HA) has a pKa value of 4.896. Calculate the fraction of HA in each of its…

A: The solution is given below -

Q: Ja In titrating 10 ml of 0.1 N HA (pKa-4),the pH after the addition of 7 ml 0.IN 10.1N 3 NaOH is О…

A: Go through the solution provided

Q: In titrating 10 ml of 0.1 M basic amino acid (pKa1= 2, pKa2 = 4, pKa3 10),the pH after the addition…

A: Molarity of Basic Amino acids = 0.1 M Volume of basic Amino acids = 10 mL Moles of Basic Amino acids…

Q: Suppose you have a buffer, comprised of 0.350 mol of weak base and 0.250 mol of weak acid.  If the…

A: Given : A buffer solution with a weak acid and its conjugate base i.e weak base. Moles of conjugate…

Q: FRQ1: Consider the titration of 25.00 ml of 0.08 M of a weak acid, HA, with 0.125 M NAOH. Calculate…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: 4. Calculate the pH of a 25 ml solution containing 0.5 g of codeine (MW = 299.36) and 1.7 g of…

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Q: Chemistry 2. The pks of tye amino acid Arg are 1.82, 8.99, and 12.48. If Arg was used as a buffer,…

A: We have find out the ratio of conjugate base to weak acid in a pH of 7.00 Arg buffer.

Q: Phosphoric acid is a triprotic acid (?a1=6.9×10^3Ka1=6.9×10^3, ?a2=6.2×10^8 Ka2=6.2×10−8, and…

A: Buffer solutions are those solutions which resist the change in pH upon addition of small amount of…

Q: Suppose a biochemist has 10 mL of a 1.0 M solution of a compound with two ionizable groups at a pH…

A: Given in following question

Q: Calculate how many milliliters of 0.140 M HNO3 should be added to 200 mL containing 2.00 g K2CO3…

A: Here we have to determine the volume in ml of HNO3 solution of 0.140M to be added to 200ml of  so2 g…

Q: How many moles of sodium acetate must be added to 500 mL of 0.25 M acetic acid solution to produce a…

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Q: 25.  A buffer is prepared using acetic acid, CH3COOH, (a weak acid, pKa = 4.75) and sodium acetate,…

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Q: You decide to put your growing knowledge of chemistry to profit by making and selling boutique soaps…

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A: Given -> Volume of conjugate base = 150 ml Molarity of conjugate base = 0.4 mM = 0.4 × 10-3 M…

Q: Choose the buffer with the greatest buffering  capacity:     d. 0.25M formic acid/formate buffer at…

A: We are given three different types of buffer solution at different pH and concentrations and we have…