1. When making a buffer of pH = 10, weak molecules with the following Ka values are available.  Which would be the best to use? 2.  A weakly acidic drug with pKa of 4.4 will exert its action on the stomach where the pH is 1.4.  Which of the following statements is CORRECT?

Q: What is the pKa of a 0.2M solution of an unknown monoprotic acid that has a pH of 4.2?

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

Q: A 100.0 ml. solution containing 0.794 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.228 M…

A: Given: Mass of maleic acid, H2M = 0.794 g. Volume of solution = 100.0 mL = 0.100 L Volume of KOH…

Q: 2. What is the hydrocyanic acid buffer solution containing 0.25 M hydrocyanic acid (HCN) and 0.50 M…

A: 2. For buffer solution pH = pKa + log [CN-][HCN]  pH = 9.31 + log 0.500.25 = 9.31 + log 2 = 9.31 +…

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: Calculate change in pH when 50 mL of a buffer is added with 5 mL of 0.10 M NaOH. The buffer has a…

A: Given that, in 50 mL of a buffer, 5 mL of 0.10 M NaOH is added. The buffer has a concentration of…

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

A: Given,  The pH of a 250.0 mL solution that contains 3.17 g of potassium monohydrogen phosphate and…

Q: Calculate change in pH when 50 mL of a buffer is added with 5 mL of 0.10 M NaOH. The buffer has a…

A: Buffer solution is a type of a solution which can resist the change in its pH when small amount of…

Q: You are asked to go into the lab and prepare an acetic acid – sodium acetate buffer solution with a…

A:

Q: A 100.0 mL solution containing 0.918 g of maleic acid (MW = 116.072 g/mol) is titrated with Ö.298 M…

A:

Q: What is the pH a buffer solution containing 0.35 M acetic acid and 0.39 M sodium acetate where the…

A: The given buffer solution is a mixture of weak acid acetic acid and its salt  sodium acetate. The pH…

Q: If 24.8 mL of 0.107 M acid with a pKa of 5.76 is titrated with 0.102 M NaOH solution, what is the pH…

A: pH = pKa + log [salt]/[acid] Number of moles = molarity x volume (L)

Q: A flask contains 50 mL of a buffer that is 0.10M in acetic acid and 0.20 M in acetate ion. What will…

A:

Q: What concentration of base is needed in a phosphoric acid buffer where the concentration of…

A: Since you have posted multiple questions, we are entitled to answer only the first.

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

A: The strength of acid is determined by acid dissociation constant.

Q: Which acid-conjugate base system should you use to prepare a buffer with a pH of 9.0?…

A: pH = 9.0  According to Henderson hasselbach equation pH of buffer solution can be calculated as- pH…

Q: A 100.0 ml. solution containing 0.794 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.228 M…

A: Given: Mass of maleic acid, H2M = 0.794 g. Volume of solution = 100.0 mL = 0.100 L Volume of KOH…

Q: A 100.0 mL solution containing 0.877 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.256 M…

A: The explanation is given below-

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: 0.50 M acetic acid and 0.20 M sodium acetate has a pH of 5.1 (buffer solution) What is the acid's…

A:

Q: a) A buffer is prepared by mixing 41.2 mL of 0.183  M NaOH with 138.1  mL of 0.231 M acetic acid.…

A:

Q: 4. ( You are performing the titration of a buffer with a pKa of 7.2. You start at the pka, and after…

A: A Buffer solution resist the change of pH,When small amount of acids ar base is added.

Q: A hypochlorous acid buffer is prepared with 0.10 moles HCIO and 0.10 moles CIO- and pH = pKa = 7.40.…

A: pH = pKa + log[salt]/[acid] ClO-  +  HCl  ----->  HClO  +   Cl- Number of moles of HClO formed =…

Q: Weak Acid Conjugate Base Ka pK. C20,2- HPO,2- HC204 6.4 x 10-5 4.19 H2PO, 6.2 x 10-8 7.21 HCO3 co,-…

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

Q: A 100.0 mL solution containing 0.790 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.284 M…

A: Maleic acid is a diprotic acid. Its two pKa values are 1.92 and 6.27.

Q: Benzoic acid (let’s call it HA) has Ka = 6.3 × 10−5 and pKa = 4.20. A buffer with [HA] = 0.100 M and…

A: Given data,pKa=4.20[HA]=0.10M[A-]=0.063MMolarity of NaOH=0.10MVolume of NaOH=20.0mL=0.02LVolume of…

Q: Show all working and express the final concentrations of lactic acid and sodium lactate in terms of…

A: To formulate recipe for preparing 0.5 M lactate buffer, we have to start from the Handerson…

Q: Consider a titration of 40.00 mL of 0.1250 M Na2CO3 with 0.4000 M HCl.  Carbonic acid (H2CO3) has a…

A: We know V1S1 = V2S2  Where, V = volume   S = Strength or concentration

Q: A sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89.  The…

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

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: Given the following buffer systems, the acetate buffer system would be the best choice to create a…

A: Answer: A buffer solution is the type of solution that resist the change in its pH on adding small…

Q: A flask contains 50 mL of a buffer that is 0.10M in acetic acid and 0.20 M in acetate ion. What will…

A: We have to calculate the pH value.

Q: if the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.74, which of the following…

A: The given information is as follows:         The pKa of HCHO2 = 3.74 The pH of the HCHO2/NaCHO2…

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: You make a Buffer using a Weak acid (HA) with a pKa of 7.95 and its Conjugate Base Salt (NaA). You…

A: pH = pKa + log{[A-]/[HA]}        = 7.95 + log(0.100/0.500)        = 7.95 - 0.698        = 7.25

Q: A buffer solution of 0.1 M concentration with a buffering zone of 3.74-5.74 pH value , specify what…

A: The considered buffer solution is 0.1M in concentration. The buffering zone is mentioned to range…

Q: Calculate the pH of a buffer prepared by dissolving 0.80 moles acetic acid (CH3COOH) and 0.40 moles…

A: pH of acidic Buffer solution is calculated Handerson   equation that is    pH = pKa +…

Q: The pH of a buffer solution containing 0.35 M acetic acid and 0.39 M sodium acetate where the pKa of…

A: Acidic buffers has acidic PH and is prepared by mixing a weak acid andits salt with strong…

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: Harriet Rowki prepared 100.0 mL of 2.50 M H3BO3-NaH2BO3 buffer solution (pH = 8.50). The pKa value…

A: A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate…

Q: to prepare a 10.0 mL 0.02 M acetate buffer with pH of 5.5. How will you prepare this? Note that the…

A:

Q: 1. The solubility of CuCl is 0.0391 g/L. Calculate the Ksp of CuCl.

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

Q: [A-] pH= pka + log [HA] a. Determine the molar ratio of NaH2PO4 and Na2HPO4 in the buffer with…

A: a) Ph of the Buffer=7.2PKa=7.2To Calculate:- Molar ratio of NaH2PO4 and…

Q: In a 0.1 M solution of a weak acid, 35% of the weak acid is dissociated. The solution has a pH=3.5.…

A: ka is the acid dissociation constant. and pKa is calculated from Ka by using formula, pka= - log (…

Q: Calculate the molar solubility of Ag2CO3 (Ksp= 8.1 x 10-12) in a solution buffered to a pH of 6.00?…

A: It is given that the pH is 6.00. thus, pH = -log H+= 6.00 H+= 10-6.00=1.0×10-6 M

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: Given with 0.025 M acetic acid and 0.025 M NaOH How will you prepare a 10 mL 0.02 M acetate buffer…

A: Here we have to prepare a 0.02 M acetate buffer solution of pH= 5.5 of volume 10ml from 0.025M…

Q: The pKa of finalic acid is 6.50. a. What is the pH of an equimolar solution of finalic acid and…

A: Hii there, As there are multiple sub parts posted. we are answering first-three sub parts . If you…

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

A:

Q: A sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89.  The…

A: Answer is explained below.  The given information are as follows: