What volumes of 50 mM CH3COOH and 30 mM NaCH3COO solutions are needed to prepare 2L of 20 mM acetate buffer pH 3.6? (pKa for acetic acid is 4.74)
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A: The correct answer is option,g. = 4.2
Q: Calculate the cocentrations of acetic acid (pKa = 4.76) and sodium acetate necessary to prepare a…
A:
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A: pH = pka + log(c_base/c_acid) at 25°: pH = -log(1.76*10^-5) + log(0.117/0.213)
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A: Given Values: ε=55290 c = ?A = 0.77 l = 1.5 cm
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A: The zwitterion is the form of amino acid which has net charge of zero. The Henderson-Hasselbalch…
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A: Given Values: Mass or weight of LiCl = 2.07 grams The volume of the solution = 40 ml The density of…
Q: amino glycine pKa is 2.4, 9.8 Calculate the most effective buffering range. if there is two pka,…
A: The amino acid is the smallest monomer of the protein, which acts as a buffer system.
Q: How much magnesium chloride hexahydrate (MW = 203.3 g/mol) is required to make a 500 mL solution ata…
A: MW = 203.3 g/mol Concentration = 10 mmol/L Volume = 500 ml solution = 500/100 L = 0.5 L
Q: What is the pH of a 0.00550 M solution of HCl?
A: Strong acids completely disassociated into ions in solution but weak acids do not. The pH of the…
Q: Calculate pH of buffer prepared by mixing; 10ml of 0.10M of CH3COOH and 20ml of 0.10M of CH3COONa.
A: A buffer is defined as the mixture of a weak acid and its conjugate base or weak base and its…
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A: KEY WORDS :- Formula for vial required = Dose required to prepareDose in hand×quantity
Q: determine the pKa of the acid and ph of the buffer sol'n of a buffer mixed with 0.1 M tris and 0.5 M…
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Q: What is the functional difference between TAE and TBE buffer?
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Q: Prepare a 75 ml of a 10% (w/v) FeCl3 solution. How many grams of FeCl3 must be weighed out and…
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Q: Define the following: - pH - Buffer - pKa
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Q: What is the final concentration if 239mL of a 3.9M glucose solution is diluted to a volume of 842mL?
A: To solve this we will use the formula - M1xV1= M2xV2
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Q: Describe the preparation of 2.00 L of 0.100 M glycine buffer, pH 9.0, from glycine and 1.00 M NAOH.…
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Q: What is the ratio of TRIS/TRIS-H+ in a TRIS buffer at pH 8.7?
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Q: What is the final volume of NaOH solution prepared from 100.0 mL of 0.500 M NaOH if you wanted the…
A: The solution is a homogenous mixture of two or more components mixed together. It has two…
Q: Which of the following aqueous solutions has the lowest pH: 0.1 M HCl; 0.1 M acetic acid (pKa =…
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Q: Calculate the concentration of Y4-ion in 0.0100 M EDTA solution at pH 6. for pH 6, α4 = 2,2 x 10-5
A: Ethylene diamine tetra-acetic acid (EDTA) is an aminopolycarboxylic acid with the formula…
Q: From the Henderson-Hasselbach equation, calculate the ratio of dihydrogen phosphate (H2PO4-) and…
A: The Henderson-Hasselbalch equation can be used to determine the pH of the buffer solution. The pH is…
Q: What is the pH of a solution of 100 ml of 0.01 M H3PO4 and 100 ml of 0.01 M Na3PO4?
A: A buffer is an aqueous solution containing a weak acid and its conjugate base or a weak base and its…
Q: s the pH of a 0.0001 M solution of hydrochloric
A: [H+]=0.0001=10-4 pH=-log[H]+ pH=4
Q: Consider a buffer solution that contains 0.55 M NH2CH2CO2H and 0.35 M NH2CH2CO2Na.…
A: NOTE: since you have asked multiple question, we will solve the first question for you. if you want…
Q: An aqueous solution contains 0.448 M dimethylamine ((CH3)2NH). How many mL of 0.240 M hydroiodic…
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Q: Describe the preparation of 2.00 L of 0.100 M glycine buffer, pH 9.0, from glycine and 1.00 M NaOH.…
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Q: A 1.0-L 0.010 M buffer with pH 6.50 is given as an assignment to a group of students. Which is the…
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Q: What is the pH of the following buffer mixtures? (a) 100…
A: Given values: (a) Volume of acetic acid = 100 ml Concentration of acetic acid = 1 M Volume of sodium…
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- At a pH of 7.40, the carbonic acid ratio is ________. a. 35:1 b. 4:1 c. 20:1 d. 3:17. · In the space provided, sketch a titration curve (pH vs H+ ions dissociated) of a phosphate buffer shown below. The pKa of H2PO4 is 7.0. H,PO, НРО, + 9. 8. 7 pH 3 1.0 0.5 H+ dissociated --> b. What is the effective buffering range of this acid? At what pH will you have 25% of the buffer in the form of H2PO4? с.Calculate the volume of TAE buffer that you will need to prepare a 100ml solution of 1X strength if you only have a 50X concentrated solution available.
- You have been provided with stock solutions of: stock A: 0.06 M sodium pyrophosphate buffer pH 8.5 stock B: 3 M ethanol stock C: 0.015 M NAD+ stock D: milli Q water Determine the volume you will need of each solution to prepare a buffer of with a final volume of 60 mL containing 10 mM sodium pyrophosphate pH 8.5, 100 mM ethanol, 1 mM NAD+. i.e. volume of stock A = _________mL volume of stock B = _________mL volume of stock C = _________mL volume of stock D = _________mL Show your calculations to arrive at your answers.1) Calculate the required gram of Tris-Hcl to prepare 1M, 100 ml Tris-HCl (Tris Stock) with mol and Molarity formula. 2)Calculate the required gram of EDTA to prepare O.5M, 100 ml EDTA (EDTA stock) mol and Molarity formula. 3.) Calculate the required volume of Tris Stock to prepare buffer A which contains 25 mM Tris-Hcl with final volume is 100 ml by using M1V1 =M2V2 formula 4) Calculate the required volume of EDTA stock to prepare buffer A which contains 10 mM EDTA with final volume is 100 ml by using M1V1 =M2V2 formula 5)Do the same for Buffer B calculationsAt what pH does a lysine solution exhibit the highest buffering capacity? (Lysine pKas: pk1 = 2.2, pK2 = 8.95, pK3 = 10.5) %3D O рH 12.1 О рH 9.72 O pH 5.67 pH 8.95
- CAR) All una Red stock soluton concentration: wis strue Somple #yelume dilution 1 ete total tock AR volume 50.00m 50. 00mL 50.00L AR COC conentrastion Absorbance Q dilutibn 2 dilution 3 10 O. 16.4 20 0. 237 turn dilution 4 25 So00 O. 392 shift unknarn 1 0.485 (Include a printed copy of the colibratlon curve) Colibrotion urve cayotion: R2 valveCalculate the mole ratio of sodium acetate and acetic acid needed to make a buffer of p H 4.68 ( see Table 15.1 for Ka values or Appendices G and H for Ka and Ksp values respectively.From the Henderson-Hasselbach equation, calculate the ratio of dihydrogen phosphate (H2PO4-) and monohydrogen phosphate (HPO4-2) components required to produce buffer solution with1. pH 6.22. pH 7.23. pH 8.2
- 1. Calculate the pH of the following solutions: A. [H+] = 1.36 x 10-9 M В. [ОН] —D 3.86 x 10-8 М 2. Calculate the pOH of the following solutions: A. [OH-] = 8.6 x 10-8 M В. рH %3D 3.2 3. What is the pH of a buffer prepared by mixing 100 ml 0.050 mM NAH2PO4 and 25 ml 0.075 mM Na2HPO4? (рКa1%32.2; рКо23 7.21; pКаз312.7)If 4 mL of 1 M NaOH is added to 100 mL buffer, would it still be a usable buffer according to the conventions? Explain why or why not.A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter. H₂C OH Lactic acid OH Calculate the pH of the buffer. H₂C. Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of the buffer. O OH Sodium lactate Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of pure water. O Na+ buffer pH: buffer pH change: water pH change: units units
