11)How do you prepare 30mm 10ml H2SO4 solution from 96%(w/w) and 1.84 g/ml stock H2SO4 solution? (H2SO4=98,08 g/mol)
1- a- How do you prepare 600 mL 4 N H2SO4 solution using 50% Sulfuric acid stock solution (d: 1.403 g/mL MW:98g/mole)? b- If you took 10 mL from this sulfuric acid solution (4N) and diluted to 1000 mL, what would be the % (w/v) and ppm concentration of the final solution.
You wish to prepare 100.0 mL of a 325.0 ppm w/v sodium (MW = 22.9897 g/mol) solution. How many grams of sodium dichromate dihydrate (Na2Cr2O7·2H2O, MW = 297.998 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
You wish to prepare 250.0250.0 mL of a 225.0225.0 ppm w/v Fe2+Fe2+ (MW=55.845 g/molMW=55.845 g/mol) solution. How many grams of ferrous ammonium sulfate hexahydrate (Fe(NH4)2(SO4)2⋅6H2O(Fe(NH4)2(SO4)2⋅6H2O, MW=392.14 g/molMW=392.14 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL.
10)You need to prepare 250 ml 20mM NaH2PO4 solution. By using NaH2PO4.4H2O, how do you prepare this solution? (NaH2PO4 120g/mol, NaH2PO4.4H2O=192g/mol) wwwwwww w w ww ww ww.ww www wwwww w ww www ww. w ww wwwa
Making Solutions Practice Problems: I. How would you prepare 100 ml of a 30% (w/v) solution of polyethylene glycol (PEG)? 2. How would you prepare 50 ml of a 9 % (w /v ) solution of NaCI? 3. How would you prepare 200 ml of 70 % ( v /v ) solution of ethanol from a stock of 95% ethanol? How would you prepare 200 ml of 0.3 M NaCl? (NaCl MW 58.44) 4. 5. How are 50 ml of...
How would you prepare a 2.5m solution of HNO3 from 10mL of 14m HNO3 ?
You have a protein solution of 200uM. You need to prepare 10ml of a 200nM solution of the protein. How much of the stock and how much water should you use? stock = water =
Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH= 9.00, from a concentrated ammonia solution (16%w/w, d=0.98g/mL) and solid ammonium chloride (97% w/w). (MW of NH3 = 17.031 g/mol and FW of NH4Cl = 53.491 g/mol and pKa NH4+/NH3 =9.24). How many grams of the solid ammonium chloride do you need? Consider two decimal places for the answer.
) How would you prepare 400.0 mL of a 0.500M HCl solution from a stock bottle of 12.0M HCI? Do the math, sketch a picture and write a statement.
(1) How much amount (in milligrams) of riboflavin (MW=376.4 g/mol) you will need to prepare a 6.4x10-4M stock solution in 10 ml volume? (2) How much volume of the above stock solution will you need to prepare the riboflavin solutions of following concentrations: a. 0.059 mM in 25 ml b. 14 uM in 25 ml