The pKa of the HEPES buffer is 7.55. What is its effective buffering range? Any pH below 7.55 Any pH above 7.55 4.55-11.55 6.55-8.55

Q: How many moles are needed to prepare  95ml of 18%(mVmV)  HCl ?  molar mass HCl =36.45g/mol steps…

A: Concentration of any solution refers to the amount or molecules of solute present in any volume of…

Q: How many moles of Na,SO4 are in 100.0 mL of a 0.2500 M solution ? The GFW is 142.07 g. O A. 0.0500…

A: 0.25 M Na2SO4 solution. Molarity = number of moles in 1L of solution So, 0.25 moles of Na2SO4 in 1 L…

Q: 0.0050 M KOH PH VALUE

A: KOH stands for potassium hydroxide. It is an inorganic compound with the chemical formula of KOH.

Q: A 100-mL buffer solution with pH of 4.80 is prepared as a stock solution. Using this stock buffer…

A: Hi! Thank you for the question. We are authorized to answer two subparts at a time, since you have…

Q: .A stock solution has a concentration of 10M. 50 mL of this stock solution is used to make 1L of a…

A: NOTE:- Since you have posted multiple questions so we will be solving the first one for you. As per…

Q: BSA mg/ml O.D. 550nm 1 0.12 2 0.23 3 0.34 4 0.41 5 0.52 Use the values above to draw a graph

A: BSA  Bovine serum albumin is a albumin protein which is extracted from cow  and used in experimental…

Q: Calculate the pH of the following buffers containing; 2.95M HC2H3O2 and 1.5M NaC2H3O2 ka = 1.8X10 ka…

A: According to Handersen Hasselbalch equation pH can be calculated using the following formula pH= pKa…

Q: Titration of a 12.0 mL solution of HCl requires 22.4 mL of 0.12 M NaOH. What is the molarity of the…

A: Molarity is considered as the moles of solute present in the solution.

Q: Please answer this part: Determination of buffer capacity Buffer Buffer capacity Base added Desired…

A: Hi!Since you have posted a question with multiple subparts, we will answer the first 3 for you.…

Q: Which of the following solutions has the highest buffer capacity? K, of HCH;O=1.8x104 (а) 0.50 М…

A: Buffers are the solution that resists the change in pH after the addition of a small amount of acid…

Q: You need to prepare an acetate buffer of pH 5.43 from a 0.621 M acetic acid solution and a 2.95 M…

A: At equilibrium  0.40875 - x moles of acid  x moles of its conjugate base. Initial moles of CH3COOH…

Q: 50 mL of 5mM NaCl solution from 1 M NaCl solution

A: Dilution is the process by which we decrease the concentration of a solution. This process is vital…

Q: You are supplied with the following:  NaCl (Mr = 58.443 g/mol)  2.5 M Tris-Cl, pH 8 oplossing /…

A: Given Values of the stock solutions to prepare digestion buffer are as follows: NaCl (Mr = 58.443…

Q: If the pH of a voledronic acid solution is 5.8, and the voledronate concentration is 9 mM, what is…

A: Henderson Hasselbalch equation can be used to determine the concentration of a weak acid in an…

Q: What is the pH of the buffer 0.17 M Na2HPO4/0.25 M KH2PO4?

A: Buffer is the mixture of strong acid and salt of that acid (base). If we add either strong acids or…

Q: How many grams are in 1 mL for the following solution?   NS _________ this is the whole question

A: NS or Normal saline: It is nothing but a mixture of sodium chloride (NaCl) and water that is…

Q: 50X TBE is 87 mM Tris-borate and 4 mM EDTA at pH 8.3. What is the molarity of each of the chemicals…

A: Given In 50X TBE  87 mM tris-borate  4 mM EDTA pH 8.3

Q: Calculate the pH of a buffer that contains 0.15 M MOPS anionic form and 0.25M MOPS zwitterion.  The…

A: The zwitterion is the form of amino acid which has net charge of zero. The Henderson-Hasselbalch…

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: You are asked to design three buffers of the following pH values: 9.10, 10.45, and 4.65. You have…

A: Buffer: It is a solution that can withstand pH changes when acidic or basic components are added.

Q: How many grams of sodium chloride are needed to make 0.60L of 2.3M sodium chloride solution

A: The concentration of a solution is expressed in molarity. Molarity is defined as the number of moles…

Q: What volumes of 50 mM CH3COOH and 30 mM NaCH3COO solutions are needed to prepare 2L of 20 mM acetate…

A: Given Values: The pH of acetate buffer = 3.6 Concentration and volume of acetate buffer = 20 mM and…

Q: To prepare 500 mL of a 1X TAE buffer solution, we need to mix solution (so 25 times more…

A: TAE is a standard buffer for the preparation and operation of DNA agarose gels. TBE provides…

Q: What is the pH when 50 ml 0.1 M NaOH is added to 100 ml 0.2 M HA? (Ką= 10 6) Lütfen birini seçin: a.…

A: In chemistry, pH is a scale that is used to specify the acidity or basicity of an aqueous solution.…

Q: We usually say that a perfect buffer has its pH equal to its pKa. Give an example of a situation in…

A: A buffer is a solution that, when adding an acid or basic components, may resist pH changes. Limited…

Q: A patient is prescribed 15mmol of potassium chloride injection. The ampoule contains 20mmol in 10ml.…

A: Given data    A 10 ml ampule contains = 20 mmol

Q: Define a buffer and explain how a buffer works. [Note: be sure to address the role of conjugate…

A: Aspirin is an acetylsalicylic acid synthesized from the esterification of salicylic acid. Salicylic…

Q: measurements using the pH meter and the pH paper? Compare the initial pH and the final pH of each…

A: pH paper is a filter paper that has a natural soluble dye that is used to test the acid or alkaline…

Q: How do I prepare a 1 M ammonium acetate buffer with a pH of 7. I have solid ammonium acetate, .1 M…

A: Ammonium acetate buffer: Ammonium acetate buffer can be prepared from the reaction of ammonia with…

Q: Given a BSA stock solution of 4mg/mL how would you prepare a 5 mL sample with a final concentration…

A: The following formula is used to find the volume required to prepare a 5 mL sample with a final…

Q: A solution is made by mixing 56.9 g of water and 23.8 g NaCl. What is the concentration of NaCl in…

A: Given Values: Weight of the water = 56.9 grams Weight of NaCl = 23.8 grams

Q: 50 mL of 15 mg/mL NaOH solution from 100 mg/mL NaOH

A: Sodium hydroxide is an inorganic compound with the formula NaOH. It is an ionic compound consisting…

Q: When counting WBCS, what is the best diluent? O Turk's solution O 0.85% NaCI O 70% alcohol O…

A: In the immune system, lymphocytes refer to the white blood cells that play an important role in the…

Q: At a pH of 7.40, the carbonic acid ratio is ________.a. 35:1b. 4:1c. 20:1d. 3:1

A: Blood is a specialized body fluid. Blood brings nutrients and oxygen to all the portions of the…

Q: A KCC student titrated 100.00 mL of a NaOH solution using 55.00 mL of a 0.1000M H2SO4 solution. How…

A: The reaction of an acid with a base is called an acid-base reaction. It is also called a…

Q: A 35 mL of solution of hydrochloric acid is neutralized by 15 mL of 0.5 M potassium hydroxide. What…

A: Hydrochloric acid is the strongest base that will react with potassium hydroxide to produce water…

Q: The pH of a 1.25 x10-3 M NAOH solution is: O a 7 b 2.90 3.10 O d 11.10 O e 10.90

A: Given Values: The concentration of NaOH solution = 1.25×10-3 M

Q: Mixing 50.0 mL of 0.200 M Na2HPO4 with 50.0 mL of 0.120 M HCI results in a buffer solution composed…

A: HCl is a strong acid. It is highly corrosive

Q: Tris NaCl buffer is known as?

A: Tris (with HCl) has a slightly alkaline buffering capacity in the 7–9.2 range. The conjugate acid of…

Q: Food dye Initial concentration (µM) | Initial volume (mL) Final concentration (µM) | Final volume…

A: Given Values: Red 40: Initial Concentration (Ci) = 32 μM Initial Volume (Vi) = 1 ml Final…

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…

A: A weak acid is used to prevent any change in the pH of the solution, regardless of the solute. On…

Q: carbonic anhydride

A: Carbonic anhydride It is the acidic oxide of carbonic acid. It is colourless, odourless and…

Q: Which of the following is TRUE if pH is higher than the pka of the buffer? O [weak acid]…

A: A buffer is a solution that is composed of a weak acid and its conjugate base. The pKa value is the…

Q: 950 mL of 1X CuSO₄ * 5H₂O solution from 25X CuSO₄ * 5H₂O solution

A: Given Values: Stock solution = 25 X CuSO4 . 5H2O Final Solution = 1 X CuSO4 . 5H2O Volume = 950 mL

Q: How much of a 5x buffer and how much water should be added to make 1 L of a 1x solution

A: For application, it's normally diluted to a "1X" concentration. A 5X concentrated solution, for…

Q: Standardization of Hydrochloric Acid Solution Answer the concentrations in 3 significant figure. The…

A: n1M1V1= n2M2V2 n1=2 for Na2CO3, n2=1 for HCl M1 is molarity of Na2CO3 V1 is volume of Na2CO3 M2 is…

Q: You are supplied with the following:   NaCl (Mr = 58.443 g/mol)   250 mM Tris-Cl, pH 8 solution (1…

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

Q: Desired Desired Initial Volume of Stock or Volume of Concentration Volume Concentration Previous…

A: In the question, we are given a table in which we know the desired concentration, desired volume and…