How much sodium formate (HCOONa, 68.0069 g/mol) do you need to add to 400. mL of 1.00 M formic acid for a pH 3.500 buffer. Ka = 1.77 x 10¯4

Q: How much of a 10x buffer should be added to 900ml of water to make a 1x solution?

A: In this question, we are given with- 1. Concentration of stock solution= 10X 2. Required…

Q: What is the strength (mg/mL) of promethazine hydrochloride in the following compound? How many…

A: Promethazine hydrochloride is the first generation antihistamine. It is used to treat allergies,…

Q: A beaker with 1.40x102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The…

A:

Q: If a pharmacist needs to prepare a bacterial suspension with a concentration of 2.4x10^2 cfu using 1…

A: A colony-forming unit is the number of viable or alive cells in cell suspension that have the…

Q: Ethanol is dissolved in water to make 0.750L of solution. Given that the solution is 2.6M, what is…

A: Calculations are very important for research and laboratory purposes. They are used to determine the…

Q: What mass of potassium nitrate KNO3 should be added to 255 g of water to prepare a 15% (m/m)…

A: Potassium nitrate is a chemical compound with the chemical formula KNO3. It is an ionic salt of…

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: What is the approximate pH of a solution labeled 6 x 10-5 M HBr? * 4.2 O 4.5 5.8 O 9.8 O 8.2

A: pH is the measure of the strength of H+ ion or Hydronium ions in solution. pOH is…

Q: You have 150 g of dextrose available and you need to compound a 20% solution. If you use the entire…

A: When we describe a concentration as a percentage without specifying the type of formula, we imply…

Q: 4. 25.0 mL of an unknown acidic solution was titrated with 42.7 mL of a 0.15 M NaOH solution. What…

A:

Q: What is the molarity of a NaOH solution if 48.0 mLneutralizes 35.0 mL of 0.144 M H2SO4?

A: An acid–base reaction is a chemical reaction that occurs between an acid and a base. It can be used…

Q: Benzalkonium chloride 17% w/v . . . . . qs           Water qs . . . . . . . . . . . . . . . . . . .…

A: Question is related to drug calculation.  Detailed solution in step 2.

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: You are asked to prepare 50 ml of a 1:100 rifampin (rifadin) and you have in stock a 1:20 rifampin…

A: Rifampin (Rifadin) is an antibiotic used to treat bacterial infections like leprosy, tuberculosis…

Q: The pH of a 0.0082 M solution of HNO₃ is

A: The pH of solution is a measure of the molar concentration of hydrogen ions in the solution and as…

Q: You want 235mL of a solution that consists of 10% BSA, 2.37mM KCl and 120µM EDTA.  You have stock…

A: BSA is a globular proteins which is a well studied proteins and used as standard protein molecule in…

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: 3. A 30.0-ml. sample of 0.20 M HA was titrated with 0.20 M NAOH. The following data were collected…

A: Given Values: Concentration of HA = 0.2 M Volume of HA = 30 ml = 0.03 L Concentration of NaOH = 0.2…

Q: If I have a 20ml stock solution of BSA with a BSA concentration of 0.2%. How can I make two other…

A: The concentration of the stock solution of BSA is 0.2%. Percent solution is the mass of solute…

Q: 1M = 1 mole/L. To determine how many grams of a substance is equal to one mole the molecular mass is…

A: C₁ = the original concentration of stock solution  V1= the volume of stock solution needed to make…

Q: A 510 mL IV bag contains a 25% dextrose solution. How much of the original solution must be replaced…

A: During IV transfusion and medicine administration, the concentration of the drug in a solution must…

Q: How many grams of copper sulfate would you need to make 5 L of a 7 M copper sulfate solution?

A: Molarity is defined as the moles of solute per litre of the solution. Hence, our target is to make…

Q: You need to prepare 1L of a 5×TE stock solution (1×TE buffer:10mM Tris,1mM EDTA).How much of Tris…

A: The mole is used as a unit in the SI system to quantify the amount of substance present. One mole is…

Q: You have a 20% stock of NaCl, a 30% stack of KHPO, 2.5 M NH CI and 10 mg/ml stock of ampicill a. How…

A: The total number of shares that are literally listed (bought and sold) throughout the business day…

Q: 12- 10- 8- 6- 4- 2- 0- 20 40 60 80 Volume of NaOH (mL) Hd

A: The titration curve is the graphical representation of pH. The pH is greater than 7 for weak acid…

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: 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: What would be the working stock concentration (in molarity) if you diluted 250 uL of a stock…

A: Molarity is defined as the number of moles dissolves in 1000 ml of the solution.

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: A solution with a density of 0.876 g>mL contains 5.0 g of toluene 1C7H82 and 225 g of benzene.…

A: Molarity is defined as the moles of a solute per liters of a solution. It is also known as the molar…

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: How many moles of Nal would be found in 250mL of a 4.5 M solution? Write your answer with three…

A: Molarity (M) is calculated as the number of moles of solute per liter of solution (moles/Liter).

Q: How could you prepare 500 mL of a 6.0 M NaOH solution using solid NaOH pellets? What is the percent…

A: Molar concentration is a measure of the concentration of a chemical species, in particular of a…

Q: Make a 100 ml of a 1M stock solution of NaCl (you will need the molecular weight of NaCl).

A: molecular weight of Back is 58.4 Molarity (M) is the amount of a substance in a certain volume of…

Q: How many moles of KBr are there in 89.5 mL of 0.150 M KBr?

A: Molarity can be stated as, it is the number of moles of solute which is dissolved per liter (L) in…

Q: How many grams of HCl are needed to make 10 uL of a 0.005g/mL acid solution?

A: Given Values: Volume of HCl = 10 μl Concentration of HCl = 0.005 gml

Q: TE buffer consists of 10 mM of Tris-Cl, pH 7.6 and 1mM of EDTA, pH 8.0. You need to prepare 3L of TE…

A: Given Values: The concentration of the stock solution of Tris-Cl = 500 mM The concentration of the…

Q: How many grams of sucrose (molecular weight = 342 g mole−1) would you dissolve in water to make a…

A: Molarity = no. of moles of solute / liters of the solution

Q: Assume that you have a stock solution of 10% SDS and you need to make 150 microliters of 0.5% SDS.…

A: Stock solution (SDS) = 10%Concentration of stock solution = 10g of SDS/ 100ml of water.Similarly,…

Q: In order to make a solution of the concentration 0.364 M, what mass of NaCl should be dissolved in…

A: The number of moles of a solute dissolved in one liter of solution is called molarity.

Q: The pH of a solution containing 20 mL of 0.120 N NaOH and 35 mL of 0.120 N NaOH is 1.49. True or…

A: Given Values: 20 ml of 0.12 M NaOH and 35 ml of 0.12 M NaOH are mixed together. The pH of the mixed…

Q: Three buffers are made by combining a 1M solution of acetic acid and a 1M solution of sodium acetate…

A: Given Values: Ka of acetic acid = 1.7×10-5 The concentration of acetic acid stock solution = 1 M The…

Q: How many mL of a ½ strength magnesium sulfate solution will contain 10 grams of magnesium sulfate?

A: Drug dose is the amount of drug in mg which is needed to be administered into the patient  Strength…

Q: If you mix 9 g of NaOH with 90 mL of water, what is the mass/volume (g/mL) concentration of the…

A: Given Values: Weight of NaOH = 9 gVolume  of the water to be mixed with 9 g NaOH= 90 ml

Q: A buffer contains 0.015 mol of lactic acid (pKa = 3.86) and 0.080 mol of sodium lactate per liter.…

A: A buffer is a aqueous solution which is used to resist the pH change upon addition of acid or base.…

Q: need to make upv3L of a 0.9 solution of CaCl2, how many grams will I need?

A: Given  Volume                    = 3L          Molarity of solution = 0.9 M  Mass of CaCl2…

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…