. Which of the following acid/ conjugate base pairs would function best as a buffer at physiological pH?     a Lactic acid / Lactate ion; pKa = 3.86   b Carbonic acid / Bicarbonate ion; pKa = 6.37   c Bicarbonate ion / Carbonate ion; pKa = 10.25   d Dihydrogen phosphate / Monohydrogen phosphate ion; pKa = 6.86   e Acetic acid / Acetate ion; pKa = 4.76

Q: The pka values of a compound with two ionizable groups are pk1 = 4.10 and pk2 between 7 and 10. A…

A: Given, pK1=4.10 pK2 = between 7 and 10 Calculating the values of pK2. By using the…

Q: You have a 0.5 L solution that is 30 mM citric acid and 0.02 M sodium citrate. What is the pH of…

A:

Q: The data below show how the pKa of Tris (Tris(hydroxymethyl)aminomethane) (a common buffer used in…

A: Answer:Equation of a straight line that passes through a point (x1) and (x2,y2) is:

Q: In titrating 10 ml of 0.1 M neutral amino acid (pKal= 2, pKa2 = 8),the pH after the addition of 5 ml…

A:

Q: 100 mL of 1.0 M formic acid (HCOOH) is titrated with 1.0 M sodium 9. hydroxide (NaOH). The titration…

A: a.) We would use the fact that at half equivalance point , pH = pKa .  b.) As pKa is point of half…

Q: Consider the following acids and bases: HCO2H    Ka = 1.8 × 10-4 HOBr    Ka = 2.0 × 10-9 (C2H5)2NH…

A: Given :      the values of the dissociation constant for the following acids and bases. HCO2H…

Q: Strong base is dissolved in 665 mL of 0.600 M weak acid (K₁ = 4.09 × 10-5) to make a buffer with a…

A:

Q: Acetic acid has a pKa of 4.76. Starting with a 1.0 M solution of sodium acetate, and a 1.0 M…

A: Given,Molarity of acetic acid = 1.0 MMolarity of sodium acetate = 1.0 MpKa of acetic acid =…

Q: Liontic acid is a weak acid with a pKa of 7.2. A 400-mL solution of 0.3 M liontate buffer was…

A: Given,pKa of liontic acid = 7.2Molarity of liontate buffer = 0.3 MVolume of buffer solution = 400…

Q: Calculate the ratio of (conjugate base)/(conjugate acid) for an acetic acid /acetate buffer when the…

A: The Acetic Acid/acetate buffer is acidic buffer with Henderson Equation as: pH=pKa + log [c2/c1] pH…

Q: A chemist generates the titration curve shown by slowly adding 0.1 M sodium hydroxide (NaOH) to 25…

A:

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: Which weak acid should be used to prepare a buffer that will maintain proton concentration [H+] at…

A: [H+]= 3.5*10^-6 PH = -log(H+)        = -log (3.5*10^-6) = 5.45  Buffer are system which resist pH…

Q: system, ncentration of the H3PO4 will decrease upon addition of KOH. ncentration of the H₂PO4 will…

A: Acidic Buffer solution is the mixture of weak Acid and its conjugate base.  When KOH is added to…

Q: Hrises more than if the same amount of NaOH is added to an acer Hremains constant. atio of acetic…

A: If NaOH is added in the buffer, then it is reacts with acid.  CH3COOH + OH- -----> CH3COO- + H2O…

Q: HA > H* + A d) A solution of an unknown acid has a Pka of 4.4. Calculate the concentration of the…

A:

Q: You are performing the titration of a buffer with a pKa of 7.3. You start at the pKa, and after 4mL…

A: pKa of the buffer = 7.3 Volume of 1 M HCl added = 4 mL Moles of HCl added = 1 M * 4 mL…

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.250 M) at pH…

A: Volume of acetate buffer = 0.5 L. Concentration of acetate buffer = 0.250 M Moles of acetate buffer…

Q: An analytical chemist is titrating 90.6 mL of a 0.2800 M solution of diethylamine ((C₂H₂)₂NH) with a…

A:

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: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…

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

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

A: Buffer solutions are useful only when the desired pH is close to the pKa value of the acid-base pair…

Q: ▼ Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05?…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

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

A: Answer of 1&3 is given below, as in equation 2 there is not statement is given so answer is not…

Q: Which weak acid/conjugate base pair would make the best buffer at PH4.0? A formic acid/ formate,…

A: The required pH of the buffer solution = 4.0  Available weak acid/conjugate base pairs are:  formic…

Q: Ascorbic acid is a diprotic acid with pKa1 = 4.l and pK2 = 11.8. You have an ascorbate buffer with…

A: Given information,       The pH of the ascorbate buffer is 11.2

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.250 M) at pH…

A: pH is used to determine the concentration of hydronium.

Q: What volume of 0.12 M HCl must be added to 1.5 g glycine amide to make buffer at pH 8.5?

A: The question is based on the concept of buffer preparation. we have been given glycinamide solution.…

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: If you need a buffer at pH=4.0, which of the following buffer systems would be the best to use for…

A:

Q: How many moles of sodium acetate and acetic acid are required to prepare 1 liter of a buffer, pH…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: Many of the Western blot immunodetection buffers are based on a buffer solution abbreviated TBS-T.…

A: Here's a step-by-step guide on how to prepare 700 ml of Tris Buffered Saline-Tween (TBS-T) solution:

Q: a.Both acids can be used  to buffer a solution at pH 4.0. b.The conjugate base of citric acid can be…

A: The higher the pKa means the weaker is the acid and we know that a Weaker acid has a strong…

Q: Benzoic acid has a Ka = 6.5 X 10-5.  What is its buffering range?     1-3     5-7     3-5…

A: The buffer range is defined as  the pH range where a buffer can resist the drastic change in pH by…

Q: Which

A: Buffer is the solution whose pH value does not alter with the addition of a small amount of acid or…

Q: Calculate the pH of a buffer system containing 2.0 M CH3COOH and 2.0 M CH3COOK.The pKa of CH3COOH is…

A: Concentration of CH3COOH=2.0M  Concentration of CH3COOH=2.0M  pKa of CH3COOH=4.74

Q: What is the ratio of HEPES/HEPES-H+ in aHEPES buffer at pH 7.9?

A:

Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…

A: Buffer solution is mixture of weak acid and salt of weak acid or weak base and salt of weak acid. It…

Q: A solution containing a monoprotic weak acid (HA) that is 8.09% dissociated was found to have a pH…

A: A solution contains monoprotic weak acid (HA) that dissociate 8.09%  And PH = 1.92  [A-] = ? at…

Q: A titration was performed where a strong acid, HCI, was titrated with a strong base, KOH. Use the…

A: a) The equivalence point is that point in titration where acid and base are completely neutralized.…

Q: Consider the list of acids and their pKa values attached  What mass ratio of sodium salt to acid is…

A: The molar ratio of NaCN and HCN buffer is calculated by using the Henderson Hasselbalch equation,

Q: You have 0.600 L of an 0.300 M acetate buffer solution (i.e. [HC2H3O2] + [C2H3O2] = 0.300 M) at pH…

A: We are provided with 0.600 L of 0.300 M acetate buffer solution having a pH of 5.30. We are required…

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