How would you make up 1 L of a 20X stock solution of the following buffer?  50mM glucose (FW=180.16) 25mM Tris (FW 121.1) 10mM EDTA (FT=372.24)  I think, I already calculated the grams of each one, but I don't know how to do the 20X Glucose: 9.008g Tris: 3.02g EDTA:3.72G

Q: What is the pH of a buffer made from 0.580 mol of CH3NH₂ (Kb = 4.4 x 10-4) and 0.200 mol of CH3NH₂I?

A:

Q: Describe how you would prepare a 3. 500.0-mL of a 0.500 M HEPES buffer (FW : = 238.3 g/mol, pK₂ =…

A: ANSWER: Dissolve 59.6 g of HEPES in enough water to make 500 mL of solution.

Q: Which of the following concentrations of sodium acetate will produce the most effective buffer when…

A:

Q: How to prepare a 2.5L of 1.5M buffer with pH=10.5 from CH3NH3Cl and CH3NH2. Show step by step

A: In order to prepare buffer ,you need to find  the volume of both weak base and it's conjugate acid…

Q: What mass of potassium lactate in g must be added to 0.85 L of a 0.41 mol L1 solution of lactic acid…

A:

Q: Propionic acid is provided (pKa - 4.0) to make a 0.8 M buffer at pH = 6.0. What is the ratio of…

A:

Q: Consider a buffer made by adding 55.5 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x…

A:

Q: What volume of 0.12M HCN and 0.13M CN- would be required prepare 500mL of pH =9 buffer? The pKa of…

A: Given data,Molarity of HCN=0.12MVolume of CN-=0.13MVolume of buffer=500mLpH=9pKa=9.21

Q: A chemistry graduate student is given 250. ml. of a 0.90 M diethylamine ((C₂H3)₂NH) solution.…

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

Q: What volume of 1.35 MHCI must be added to 0.287 L of 0.323 Mdimethylamine to produce a buffer with a…

A:

Q: A weak base B (FM = 121.14 g/mol) has Kp = 1.2 x 106. What is the mass of B that must be taken with…

A:

Q: What acid-base indicator should be used for the titration of 50.00mL of 0.0500 N HCl with 0.0500 N…

A:

Q: In the titration of 30.0 mL of 0.05 M acetic acid with 0.10 M NaOH, after adding 20.0 mL of base: 1…

A: The question is based on the titrations.  we are titrating a weak acid with a strong base. we need…

Q: Methionine (molarmass149 gmol) has pKa12.3 and pKa29.2. Can you make a 1.5 L 0.100 M buffer with…

A: A buffer is a solution of weak acid or conjugate base and conjugate acid. It is used to resist the…

Q: What is the pH of a solution containing 0.16 mol L-1 of HCI and 0.828 mol L-1 of a weak acid with…

A: Answer: In the presence of strong electrolyte having a common ion dissociation of weak electrolyte…

Q: A buffer is prepared by combining 15 g of H2CO3 (carbonic acid) with 180 mL of 0.25 M NaOH and…

A: Given that, the reaction is:mass of H2CO3 = 15 gvolume of NaOH = 180 mL = 0118 Lmolarity of NaOH =…

Q: What is the pH of a buffer that is 0.485 M HF and 0.495 M LiF? The K, for HF is 3.5 x 10-4. Your…

A: Given,

Q: Consider a buffer made by adding 52.3 g of (CH3)2NH¿l to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x…

A: In given question example of basic buffer

Q: What volumes of 0.200 M HCOOH and 2.00 M NaOH would make 0.450 L of a buffer with the same pH as a…

A: The volume of the benzoic acid solution is 475 mL which is equal to 0.475 L and the volume of the…

Q: What is the final pH of a buffer prepared by mixing 450 mL of 0.25 M Tris base with 130 mL of 0.50 M…

A:

Q: What masses of dimethylamine and dimethylammonium chloride do you need to prepare 3.00 L of pH =…

A: Given,  The volume of dimethyl amine and dimethyl ammonium chloride buffer = 3.00L The total…

Q: 2. You have an 800 ml solution containing 72 g of an unspecified compound. Determine the molarity…

A: 2.  Molarity It is defined as the number of moles to the volume of solution in litres. To calculate…

Q: What ratio of NaF : HF must be added to prepare a buffer with a pH 2.69 Ka = 4.6 x 10-4 pH = pKa +…

A: Given that,  pH of NaF: HF buffer solution = 2.69 Ka value of HF = 4.6 x 10-4 Since, pKa  = - logKa…

Q: 1.You    need    to    prepare    1L    of    a    5xTE    stock    solution    (1x    TE    buffer:…

A: Q1)                 Volume of buffer solution = 1 L (1000 mL)  Conc. of buffer solution to be…

Q: In order to prepare a buffer of 4.24, what ratio of  [acetate ion] / [acetic acid]?   pKa of CH3COOH…

A:

Q: Consider the following reaction: CH₂COOH(aq) +OH(aq) - - 1st attempt CH₂COO" (aq) + H₂O(1) ml 4 Jl…

A: Given,Molarity of NaOH = 5.50 MMolarity of acetic acid = 0.0205 M Molarity of sodium acetate =…

Q: sure to answer all parts. nicrobiologist is preparing a medium on which to culture E. coli bacteria.…

A: Given pH = 7She want to make 450 mL of pH We have to find volume of equimolar mixtures of H2 and…

Q: What is the molar solubility of the hypothetical compound MBr3 in a solution containing…

A: Given: Concentration of NaBr = 0.3000 M  And Ksp of MBr3 = 7.2 × 10-7.

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: One liter of a 0.1 M Tris buffer (pKa of Tris = 8.3) is prepared and adjusted to a pH of 2.0. B)…

A: Given, concentration of buffer solution is 0.1M. pKa of the acid = 8.3 What is the pH when 1.5 mL of…

Q: What is the pH of a buffer that is 0.296 M HF and 0.416 M LiF? The K, for HF is 3.5 x 10-4. Your…

A:

Q: What volume of 0.50 M HNO3 should be added to 200. mL of 0.25 M NH3 in order to create a buffer with…

A:

Q: Which of the following would be the best choice to prepare a buffer with pH = 3.00 ? A. C5H5N:…

A: Acidic buffer solution - a buffer solution that made of weak acid and its conjugate base ( strong…

Q: What mass of solid K₂CO3 (molar mass = 138.0 g/mol) should be added to 0.995 L of 0.535 M HCO3 to…

A: Volume of HCO3- = 0.995 L  Molarity of HCO3- = 0.535 M = 0.535 mol/L pKa for HCO3- = 10.32    pH of…

Q: (3) How will you prepare 500 ml of 0.750 M citrate buffer with pH of 4.25 from solid citric acid…

A: Here we have to prepare  500ml of 0.750M citrate buffer from citric acid and sodium  citrate.  Ka =…

Q: If you prepare a best buffer with pH 3.5, which of the following compounds you will use?   a.…

A: Given: The pH of the buffer solution = 3.5 We have to find the best combination of substances…

Q: A laboratory manager wants to prepare 1000.0 mL of a buffer with a pH of 4.696 from equimolar…

A:

Q: Which of the following combinations of acids and conjugate bases would be the best to create a pH…

A: 1- In this question, we will see the best buffer system at pH 7.0  You can see the details…

Q: What is the pH of a buffer that is 0.485 M HF and 0.495 M LiF? The K, for HF is 3.5 x 10-4. Your…

A: Given data,  Concentration of HF = 0.485 M  Concentration of LiF = 0.495 M  Ka for the HF acid is…

Q: find the amovnt of buffers and water needed to made 100 mL of 3x buffer of this buffer 1 x bUTfer…

A: Concentration of stock = M1 Volume of stock solution needed = V1 Concentration of diluted 3X buffer…

Q: what weights of citric acid and its varfouy satts are requtred to prapore 2.02 of a k- itrate…

A: Desired pH = 6.26 => - log[H+] = 6.25 => [H+] = 10-6.25 = 5.62*10-7  Volume of the desired…

Q: A buffer with a pH of 9.71 is to be prepared from NH3 and NH4Cl. What ratio of base to salt would…

A: first find pOH then apply Henderson equation of buffer solutions.

Q: 8) What weight of sodium carbonate (Na2CO3) and sodium bicarbonate (NaHCO3) are required to make 100…

A: Given: For H2CO3, pKa1 = 6.1pKa2 = 10.3Molecular weight of Na2CO3 = 106 g/molMolecular weight of…

Q: What is the pH of a buffer solution made of .50 M CH3CO2H and .36 M NaCH3CO2? pka= 4.7 for CH3CO2H

A: Step : 1         What is the pH of a buffer solution made of .50 M CH3CO2H and .36 M NaCH3CO2? pka=…