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: A solution is made by dissolving 9.5 g of sucrose, C12H22O11 (molar mass 342.3 g mol-1) in water to…

A: Molarity of the solution is defined as the mole of solute, which is dissolved in the per (L) liter…

Q: How much of the enzyme proteinase k (solute) is required to make 250ml of a solution with a…

A: A protease (also called a peptidase or proteinase) is an enzyme that catalyzes proteolysis.…

Q: The Ksp of lanthanum fluoride, LaF3, is 2.00 × 10-19. Calculate the molar solubility, x, of this…

A: Step 1: The maximum amount of substance that can dissolve in a given amount of solvent is…

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: 2) Calculate the pH during the titration of 20.00 mL of 0.1000 M butanoic acid (K,-1.54x10%) with…

A: Step 1:Step 2: Step 3:Step 4:Step 5:

Q: 9. 3 μL of a 45 mM stock solution of a substrate is added to 8 mL of water. Calculate the following…

A: The objective of this question is to calculate various parameters related to a solution of a…

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: What is the molarity of a 30% solution of NaCI

A: Let us first define the percentage solution : 30% NaCl solution= 30% w/v solution = 30g/100 ml.Since…

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: You record the absorbance of your unknown BSA sample at 0.276. What is the concentration in ug/mL of…

A: Standard curve can be used to determine the concentration of unknown sample by determining their…

Q: calculate the pH of a 0.10M solution of formic acid. the Ka of formic acid is 1.8x10^-4

A:

Q: You want to prepare a 15 mL gel containing 0.8% (weight /volume) agarose. How much agarose do you…

A: Agarose is a polysaccharide extracted from seaweed that, when mixed with water, forms a gel-like…

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: Provided Stock solution of Coomassie Blue: 0.500 mg/mL Volume of 0.500 mg/ml Solution Dilution to ID…

A: For calculating volume and concentration,  we should follow the formula V1S1 = V2S2where, V1 =…

Q: Determine the pH for the following solutions.  {H3O+}=2.4x10^-2 M

A: p in pH denotes negative of the logarithm(-log). So pH is negative logarithm of molarity of H pH…

Q: You have started with 0.37 g of an unknown acid. You follow the procedure outlined in the video…

A: The scale which is helpful for measuring the acidic nature or basic nature of aqueous solutions 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: How much water must be added to 300 mL of an aqueous solution of 0.2 M acetic acid in order to…

A: Given : 0.2 M acetic acid solution , volume 300 ml Let C1 = 0.2 M C2 = concentration of acetic acid…

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: BSA Concentration (ug/mL) Abs 2000 2.25 1500 1.715 1000 0.915 750 1.156 500 0.714 250…

A: A standard curve is defined as a calibration curve that is used for quantitative estimations. In…

Q: How many grams of NaOH would you need to make 3,982 mL of a 3 M NAOH solution (m.w. = 40.00 g/mol)?…

A: By the concept of molarity, we can determine the concentration of a solution. It is the total number…

Q: alculate the concentration in mmol/L of the chemist's aluminum sulfite solution. Be sure your answer…

A: Molarity It is defined as the number of moles of a substance dissolved in 1 litre of a solution.…

Q: Can you finish the chart and finish the results also I don't know how to calculate to get the…

A: To complete the provided chemistry lab report, we first need to fill in the missing values in the…

Q: How many grams of NaOH would you need to make 7,252 mL of a 230 mM NaOH solution (m.w. = 40.00…

A: Answer- Here molarity of the solution is provided and requires the amount of weight of NaoH.

Q: How much of 9XTBE (in ml) and how much water (in L) do you need to prepare 2 L of 1XTBE? I need I…

A: Given, 9xTBE and water. We need, 2L of 1xTBE solution. We will use the formula, M1V1 = M2V2 M1 and…

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: 75 g of impure sodium hydroxide is added to 250 cm3 of water. 10 cm3 of this impure solution is…

A: In order to find out the percentage purity of a compound, the molarity of the compound is…

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: 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…

Q: What is the pH of a buffer that contains 0.9 M ammonia and 0.3 M ammonium ion? (Ka for ammonium ion…

A: The objective of this question is to calculate the pH of a buffer solution containing ammonia and…

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: 12 grams of glucose will make how many mL of a 0.5 g/mL solution?

A: Given Values: Weight of glucose = 12 g Concentration = 0.5 gml How much volume of water needs to…

Q: A buffer solution contains an equal concentration of weak acid HX and its conjugate base ion X™. The…

A: The objective of the question is to calculate the pH of a buffer solution containing equal…

Q: How would you make wash buffer with 0.05M Tris containing 0.05M NaCl in 200ml at pH of 8.0

A: A solution is a mixture of one or more than one solute mixed in a solvent. The molarity of the…

Q: How do you make a stock solution of 1000 ppm using a solution which Has a density of 0.842 g/mL?

A: Introduction : To prepare a stock solution of 1000ppm using a solution with a density of 0.842g/𝑚L,…

Q: ordered is 2.5 g of Staphcillin. The vial reads: Add 8.6 ml of diluent to contents of vial. Each ml…

A: Penicillins are used to treat bacterial infections. They function by either eradicating the germs or…

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: 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: How do you prepare 500 mL pH 6 Citric acid/Phosphate buffer in the laboratory. Please explain…

A: A buffer solution is a solution that only changes slightly when an acid or a base is added to it.

Q: 10 mL of 0.5 M CuSO₄ * 5H₂O solution from 10 M CuSO₄ * 5H₂O solution

A: CuSO₄ * 5H₂O solution is copper sulphate pentahydrate solution. The concentration of stock solution…

Q: Thimerosal Tincture USP contains 0.1% w/v thimerosal and 50% v/v ethyl alcohol. If the cap is left…

A: The objective of this question is to determine the concentration of thimerosal in the evaporated…

Q: Calculate the volume of TAE buffer that you will need to prepare a 100ml solution of 1X strength…

A: TAE buffer stands for Tris-acetate-EDTA buffer. It is used in lab to do electrophoresis of nucleic…