Describe the preparation of 0.50L of a 0.20 M Hepes buffer pH 7.7 You are given the following materials in lab: Hepes: pKa 7.55; Molar mass: 260.29 g/mole, conjugate base, solid. 1.0 M HCI , 1.0 M NAOH, and dH2O available to use (you have to decide if you need to titrate with HCI or NaOH).

Q: A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pK a of 4.54, how many mL…

A: Given pKa of HB = 4.54 By using the equation,

Q: hosphoric acid is a triprotic acid with the pK, values pKa1 = 2.148, pK2 = 7.198, and pK3 = 12.375.…

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

Q: A chemist titrates 180.0 ml. of a 0.8115M cyanic acid (HCNO) solution with 0.7971 M NAOH solution at…

A: When acid and base reacted then at equivalence point,salt is formed.

Q: An analytical chemist is titrating 234.9 mL of a 0.8800 M solution of isopropylamine 13),CHNH2) with…

A:

Q: An analytical chemist is titrating 163.2 ml. of a 0.7200 M solution of isopropylamine ((CH3)2 CHNH₂)…

A:

Q: a. Use the Ka values provided to chose a weak acid that can effectively buffer a solution at a pH of…

A: Given data,

Q: An analytical chemist is titrating 185.1 ml of a 0.6700 M solution of dimethylamine ((CH,), NH) with…

A:

Q: An analytical chemist Is titrating 150.5 mL of a 0.1400M solution of aniline (CH,NH,) with a 0.4000M…

A:

Q: A diprotic acid, H2A, has the ionization constants: Ka1 = 1.1 × 10–3 ;Ka2 = 2.5 × 10–6. In order to…

A: for making buffer solution the value of pKa for acid should near equal to the pH value ..

Q: A student needs to prepare a buffer solution with a pH of 5.20. Assuming a pKą of 4.52, how many mL…

A: I have attached the detailed solution to the question below.

Q: A 27.69 mL aliquot of weak acid that has a concentration of 0.648 M will be titrated with 0.33 M…

A: Since, you have posted multiple questions, we will answer the first the first one. If you want any…

Q: Calculate the mL of acetic acid (0.845 M) and baking soda (assume 0.735 M) that need to be mixed to…

A: Buffer are the solutions which prevent any change in the pH of a solution when small amount of an…

Q: An analytical chemist is titrating 86.0 mL of a 0.2300M solution of propylamine (C,H,NH,) with a…

A: Here we are required to find the pH of the solution

Q: You need to prepare an acetate buffer of pH 5.42 from a 0.774 M acetic acid solution and a 2.96 M…

A:

Q: I have 0.2140grams of an unknown momoprotic acid that requires 27.4 mL of 0.0950M NaOH to reach the…

A: Let the unknown acid be represented as HA. Thus, reaction is shown as- HA + NaOH→NaA + H2O

Q: An analytical chemist is titrating 133.0 mL of a 0.2700 M solution of piperidine (C,H, NH) with a…

A:

Q: 0.50 M solutions of each weak acid in the table are available. Choose an acid solution and determine…

A: Henderson Hasselbalch equation shows relation between pH and pKa. So, we will solve the above…

Q: A student needs to prepare a buffer solution with a pH of 4.21. Assuming a pK, of 4.15, how many mL…

A:

Q: A chemist titrates 180.0 mL of a 0.4192 M cyanic acid (HCNO) solution with 0.5880M NAOH solution at…

A: Given Information-  Volume of HCNO = 180.0 mL  Molarity of HCNO = 0.4192 M Molarity of NaOH =…

Q: You are to prepare a 500.0-mL buffer solution. ou have exactly 0.125 mol of NaO2CCO2H. Prepare a…

A:

Q: What will be the pH of a solution when 200ml of 0.1M HEPES in the basic form and 100mL of 0.1 M…

A: Given: Concentration of Base = 0.1 M volume = 200 mL = 0.2 L concentration of acid = 0.1 M volume =…

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

A:

Q: You are to prepare a 500.0-mL buffer solution. ou have exactly 0.125 mol of NaO2CCO2H. Prepare a…

A: Note : both questions are interrelated.  Given: Volume of buffer solution = 500 mL , pH = 2.250 and…

Q: A chemist titrates 170.0 mL of a 0.8630M lidocaine (CH21NONH) solution with 0.1298 M HNO, solution…

A:

Q: A 50.000 mL aliquot of weak base that has a concentration of 0.285 M will be titrated with 0.684 M…

A: Given that,  Volume of 0.285 M weak base = 50.0 mL = 0.05 L Moles of weak base given = 0.285 M×0.05…

Q: You need to prepare an acetate buffer of pH 5.30 from a 0.712 M acetic acid solution and a 2.18 M…

A: When an "acid and base react" with each other, the product is a "salt and water". This type of…

Q: An analytical chemist is titrating 221.9 mL Oof a 0.9800M solution of propionic acid (HC,H,CO,) with…

A:

Q: lytical chemist is titrating 161.4 mL of a 0.8000M solution of trimethylamine ((CH3),N) with a…

A: HIO3 is an strong acid,  left amount of HIO3 deside the PH  of solution

Q: A chemist needs to prepare a buffer solution with pH = 10.00 and has both Na2CO3 and NaHCO3 in pure…

A: Given pH of buffer solution = 10.00 Volume of buffer solution = 1.00 L Total mass of salts = 10.0 g…

Q: An analytical chemist is titrating 64.9 mL of a 0.5800M solution of isopropylamine ((CH, CHNH, with…

A: The question is based on the concept of titration. we are titrating a weak base with a strong acid.…

Q: A student needs to prepare a buffer solution with a pH of 4.54. Assuming a pK, of 4.58, how many ml…

A:

Q: Prepare a buffer by direct addition. Consider how best to prepare one liter of a buffer solution…

A: The equation required to deal with a buffer solution is Henderson Hasselbach equation. pH = pKa +…

Q: A chemistry graduate student is given 250. mL of a 1.30M pyridine (C,H,N) solution. Pyridine is a…

A:

Q: A student needs to prepare a buffer solution with a pH of 5.63. Assuming a pką of 4.49, how many mL…

A: Given: pH = 5.63 pKa = 4.49 Let M1 & V1 be molarity & volume of B- and M2 & V2 be those…

Q: A student needs to prepare a buffer solution with a pH of 5.86. Assuming a pką of 4.30, how many mL…

A: Given: pH = 5.86 pKa = 4.30 Concentration of NaOH = 0.1 M Concentration of HB = 0.1 M Volume of HB =…

Q: Preparation of buffers 1. Prepare 250ml of the following buffer solutions. Concentration Buffer…

A: Interpretation: To prepare 0.5 M, 250 mL of acetate buffer with a desired pH of 5.0.

Q: Conjugate base, Molar Ratio, pOH, Salt, [H+], [OH-], pKa, and the acid

A:

Q: Calculate the concentrations of the weak acid and conjugate base for the best possible buffer at pH…

A: The best buffer is the formic acid/formate buffer system because it has a pH under 3.75 other…

Q: A dilute (~0.1 M) buffer solution contains imidazolium ion/imidazole (see below) and has a pH of…

A:

Q: A chemist titrates 150.0 mL of a 0.0676M dimethylamine (CH,) NH) solution with 0.4402M HBr solution…

A: Interpretation - To calculate the pH at equivalence point.     Given  molarity of dimethyl amine =…

Q: (1). What will be the pH when 50.0 ml of 2.00 M carbonic acid is mixed 20.0 ml of 3.00 M sodium…

A: #1:  Given the volume of 2.00 M carbonic acid, H2CO3 = 50.0 mL * (1L/1000 mL) = 0.050 L => moles…

Q: A 34.8 mL aliquot of weak acid that has a concentration of 0.752 M will be titrated with 0.853 M…

A: Please have a look on the solution below:

Q: An analytical chemist is titrating 208.7 mL of a 0.5200M solution of isopropylamine ((CH,),CHNH,)…

A: Answer: 10.10

Q: A student needs to prepare a buffer solution with a pH of 6.00. Assuming a pKą of 4.86, how many mL…

A: pH = 6.00    ; pka = 4.86  Concentration of B- = 0.1 M  Concentration of HB = 0.1 M  Volume of HB =…

Q: A student needs to prepare a buffer solution with a pH of 4.60. Assuming a pK a of 4.12, how many mL…

A: A solution which resists change in pH when a small amount of acid or base is added to it is known as…

Q: Consider how best to prepare one liter of a buffer solution with pH = 3.79 using one of the weak…

A: In the given question, preparation of buffer solution is required with pH = 3.79. The closest pKa…

Q: Arsenic acid is a triprotic acid with the pKa values pK₁1 = 2.240, pKa2 = 6.960, and pK₁3 = 11.500.…

A: Here we have to determine the mass of NaH2AsO4 and NaH2AsO4 required to prepare 1L of buffer…

Q: A student needs to prepare a buffer solution with a pH of 4.18. Assuming a pKa of 4.69, how many mL…

A:

Q: Caiculating the pH of a weak base titrated with a strong acid An analytical chemist is titrating…

A: In this question, we want to determine the pH of the resulting solution after completing the…

Q: An analytical chemist is titrating 122.9 mL of a 0.6300M solution of isopropylamine ((CH,), CHNH,)…

A: