Which of these compounds would be the best buffer at pH 5.0: formic acid (pKa = 3.8), acetic acid (pKa = 4.76), or ethylamine (pKa = 9.0)? Briefly justify your answer.

Q: "he following graph was generated during the titration of a weak acid with NaOH. 14 12 10 6. 25 50…

A: The above graph is of titration of weak acid with strong base. In this following reaction takes…

Q: acetic acid, CH3COOH is a commercially weak acid with a value of Ka = 1.8 x 10 ^ -5. In an…

A: Dissociation of weak acid: CH3COOH⇋CH3COO- + H+ Ka=CH3COO-H+CH3COOH

Q: Compare Tris and PBS as buffers in terms of temperature, ionic strength, and solvent effects.

A: Tris buffer is used as running buffer in agarose gel electrophoresis. Phosphate buffer saline is…

Q: What is the pH of a buffer that is 0.120 M in formic acid (HCHO2) and 0.080 M in potassium formate…

A: Given, Ka = 1.8 * 10-4. a) 2.33 b) 3.57 c) 3.74 d) 3.91

Q: 14. What is the pH of a mixture of 0.20M acetic acid and 0.30M sodium acetate, if the pKa of the…

A: Dear student , since you have posted multiple questions we will allow to solve only first question…

Q: The pk, for the acid dissociation reaction of bicarbonate is 10.33. HCO3 (aq) + H2O(1) 2 CO32-(aq) +…

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Q: If a researcher needs the pH of a reaction solution to be maintained at pH 8.3. There are a number…

A: Since, Buffer can affect when small amount of acid or bases will be added. Thus,

Q: Sulfate buffer? Your laboratory is out of materials to make phosphate buffer and you are…

A: A buffer solution is formed by the weak acid and its conjugate base or weak base and its conjugate…

Q: Many chemical reactions are carried out in the presence of buffers. Use the Henderson-Hasselbalch…

A: Buffer solution : it is a solution which resists in change in pH of solution when a small amount of…

Q: Describe the titration curves of each of the acids. Weak acids pK1 pK2 pK3 Phosphoric acid 2.15…

A: Two significant ideas in science are titration and corrosive base responses. Titration is the…

Q: The determination of amine nitrogen by formular titration is based on Choose one answer: a.…

A:

Q: Starting with solid glycine-HCl and 0.75 M NaOH, how would you prepare 500 mL of 0.050 M glycine…

A: The question is based on the concept of chemical equilibrium. a buffer is a solution which resist…

Q: Which

A: Those solution when resist to change the pH when small amount of acid or base added on it's then…

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

A: The acid data given is,

Q: A. What two compounds would be best to use in preparing a pH 9.0 buffer solution? justify your…

A: (A) Buffers are effective when the pKa values are closest to pH. Thus, the two compounds best for…

Q: During the titration of 25 mL of 0.1 M maleic acid with 0.1M NAOH. We have studied the plot of alpha…

A: The graph of alpha values and Volume is as follows:

Q: An employer is interviewing 4 applicants for a job as a laboratory technician and asks each of them…

A: Buffer solution is defined as a solution that oppose changes in pH while adding little amount of…

Q: Vitamic C, aka ascorbic acid (H₂C₆H₆O₆) is a weak diprotic acid. Which of the following aqueous…

A:

Q: To make a buffer, the ratio of conjugate base to acid was A-/HA=1.5/1. In order to make 60mM…

A: given: ratio [A-][HA]=1.51 we need to prepare 60mM solution of buffer, 60mM = 60 x 10-3 M now,  [A-]…

Q: Describe how to prepare 0.500 L of 0.100 M imidazole buffer, pH=7.50, pKa= 6.99 starting with…

A: Henderson-Hasselbach equation shows the relationship between pH of a solution, the acid dissociation…

Q: You wish to prepare an HC2 H3 O2 buffer with a pH of 4.14. If the pKa of HC2H3 O2 is 4.74, what…

A: Given :-   pH of buffer solution = 4.14  pKa value for HC2H3O2 = 4.74  To calculate :-  Ratio of…

Q: Prepare 1.0 L of a 0.1 M histidine buffer, pH 7.0, starting with histidine dihydrochloride…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base .   it…

Q: A buffer solution contains 0.10M benzoic acid (C6H5COOH, Ka= 6.3 x 105) and 0.10M potassium benzoate…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Which one of the following indicators would be best to use when titrating 0.1M morphine (Kb = 1.6 ×…

A: pH is a measure of hydrogen ion concentration in solution and it measures acidity or alkalinity of a…

Q: 5. Amino acids, with the general formula HiN-CH-Co.H, can behave as buffers. Which response…

A: Amino acids can act as a buffer because it has both amine group and acid group.Amine group can act…

Q: Use the Henderson-Hasselbach equation to determine the ratio of acid to conjugate base if a buffer…

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Q: If you prepare 200mL of this buffer, how much of the bolded reagent would you weigh out? Answers…

A: We have to prepare a 200 mL buffer solution by adding the desired concentrations of Tris base,…

Q: The Ka of bromoacetic acid is 2.00 ×10–3.  What masses of bromoacetic acid (CH2BrCOOH) and sodium…

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Q: Which of the following compounds is BEST to construct a buffer at pH 8.00? Аcetic acid (pKа %3D…

A: Answer Buffer :- weak acid and its conjugate base makes the buffer…

Q: Phosphorous acid, H,PO,(aq), is a diprotic oxyacid that is an important compound in industry and…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Consider the list of acids and their pKa values attached What two compounds would be best to use in…

A: Buffers are effective when the pKa values are closest to pH.

Q: From the titration curve below, estimate the "target pH" to synthesize potassium dihydrogen…

A:

Q: Consider the list of acids and their pKa values attached What two compounds would be best to use in…

A: A buffer solution performs best when the concentration of acid/ base is equal to the concentration…

Q: escribe  the curve and why pH = pka at half equivalence point

A: pH is negative logarithm of Hydrogen ion concentration

Q: Describe the preparation of 500.00 mL of 0.250 M benzoate buffer ( pH = 4.7; pKa = 4.20). 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…

A: amount of given concentrations salt concentration Na2HPO4 = 100 ml X 0.1 M = 10 mmol acid…

Q: You were given with 0.025 M acetic acid and 0.025 M NaOH. You were then instructed to prepare a 10.0…

A:

Q: suppose there is 1.00L of an aqueous buffer containing 600.0 moral & acetic acid (pk. 4.76) and 40.0…

A: NaOH is a base and when it is added to the buffer , it gets add up to the base concentration and…

Q: A buffer solution contains 0.10M benzoic acid (C6H5COOH, Ka = 6.3 x 105) and 0.10M assium benzoate…

A:

Q: Acetic acid’s pKa is 4.75 and nitrous acid’s pKa is 3.16. If you made one buffer of equal parts…

A: Given: pKa of acetic acid = 4.75  pKa of nitrous acid = 3.16  And both the buffers have an equal…

Q: To make 110 microliters of working enzyme solution, You were adding 2 microliters of enzyme and how…

A: To find the unknown values from known values, the formula used is, M1V1=M2V2 where M is the molarity…

Q: A microbiologist is preparing a medium on which to cultureE. colibacteria. She buffers the medium at…

A: To calculate the volume of the equimolar aqueous solution of K2HPO4 and KH2PO4 that must be combined…

Q: A particular buffer has been made up at 25 °C to give a pH of 8.00 and is then warmed to 35 °C. The…

A: The expression of Henderson-Hasselbalch equation is shown below:

Q: the pH of an acetate buffer prepared by dissolving sodium acetate (5.21 g) and acetic acid (2.19 g)

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

A: Given,  pH of buffer =7.4             pKa =8.08  pH of any buffer solution can be calculated by…

Q: How many mL of 0.600 M NaOH should be added to 5.38 g of carbonic acid (H2CO3, FW = 60.02) (pKa1 =…

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

A: Soaps are salts of fatty acids (weak acid) and strong base. The salt hydrolysis formula for the…

Q: Use the Henderson-Hasselbalch equation to calculate the pH of a solution of HEPES buffer made from…

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

Q: masses of bromoacetic acid and sodium bromoacetate are needed to prepare 1.00 L of pH = 3.00 buffer…

A: Given values -> Volume = 1 L pH= 3.00 Total concentration of buffer = 0.200M Molar mass of sodium…