Explain how you would prepare 10 ml of a 50 μM solution of caffeine. The Mw of caffeine is 456 g/mol.
Explain how you would prepare 10 ml of a 50 μM solution of caffeine. The Mw...
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.
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...
A student dissolves 0.2062 g of caffeine (MW: 194.19 g/mol) into 50.00 mL of deionized water. What is the concentration of the caffeine in the solution in ppm (parts per million)? A student performs a spectrophotometric analysis using external calibration and obtains a linear relationship with a slope of 0.0550 and a y-intercept of 0.011. In order to analyze an unknown solution, the student dilutes 10.00 mL of the unknown solution to 50.00 mL. If the absorbance of the dilute...
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.
(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
You are given a 2.8 mM solution of a protein (MW 27,000 g/mol). Using this information fill in the blanks below to fit the units given. ___________________μmole/ml ___________________ g/L ___________________ mg/ml Convert 46.2 nmol/ml to μM. Convert 46.2 μmol/L to μM. Convert 46.2 nmol/μL to μM.
How many mL of glycerol (MW=92.1 g/mol, density 1.26 g/mL) must be used to prepare 250.0 mL of a 0.150 M glycerol solution? Answer: 2.74mL glycerol
if you have a 10 Malary sodium hydroxide solution, how could you prepare 50 mL of a three Malary sodium hydroxide solution? malary should say molarity
1. How would you prepare 125 ml of a 10% (v/v) solution of acetic acid in H2O? 2. How would you prepare 60 ml of a 5% (W/V) NaCl solution in H20? 3. How would you prepare 3 ml of 82% solution A and 18% solution B? 4. 5 ml of a 2.0 mg/ml protein solution contains mg protein. a. If 1.0 ug/ml of pigment X shows an absorbance of 0.059 at 370nm, then what is the concentration of a...