Describe how you would make a 100 p pm caffeine (FW 194.19 g/mol) stock solution.
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...
(3 pts) 4. You are asked to prepare a 0.100 M)glycine buffer pH 9.0. You are given a bottle of glycine (FW 75.1 g/mol) and a stock solution of 1.00 M NaOH. How many grams of glycine and how many milliliters of NaOH stock solution would be required to produce 2 liters of this buffer solution? pk,95 alyeine tr oon 2 38 CHA) 7 3A1 (HA o.l0o glycine 3.98
(3 pts) 4. You are asked to prepare a 0.100 M)glycine...
Explain how you would prepare 10 ml of a 50 μM solution of caffeine. The Mw of caffeine is 456 g/mol.
Staurosporine (FW: 466.53 g/mol) is a potent reagent used to inhibit various PKC isoforms in human cell lines, and is supplied in a vial containing 2 mg of lyophilized powder. You want to treat 10 ml of HL-60 cells with a final concentration of 10ηM (nanoMolar) staurosporine, and you only want to add 5 μl of staurosporine solution to the cells. What concentration should you make your stock solution of staurosporine in order to make this 5 µl addition? Based...
If erythritol has a MW of 122.12 g/mol, how would you make a 20% solution in 100ml of distilled water?
You have a 5 mg/ml solution of caffeine (molar mass 194.2 g/mol). You diluted that solution 200 times (200 fold),. Calculate the final concentration (in uM, micromol/t) of caffeine after dilution 12.9 uM 19.4 uM 129 uM 194.2 uM
4. Calculate and describe how to make a 100 mL solution of 3 mM potassium hexacyanoferrate (III) (329.24 g/mol) in 0.1 M potassium chloride.
You start with a 4M stock solution of NaCl, you need to make dilutions to obtain various working solutions. Describe how you would make 100 mL of a working solution that has a final concentration of 1M. Be sure to include the volume and concentration of the components.
Calculate how much of each solution (and water!) you would need to make 100 mLs of a 0.1 M Tris/0.05M EDTA solution from 1M Tris and 1 M EDTA stock solutions?
Part A Describe how you would make 100.0 mL of a 1.00 M NaOH solution from a 20.0 M stock NaOH solution. Express your answer with the appropriate units. L! - m o mi? Dilute Value Units of the 20.0 M stock solution to a final volume of 100.0 mL Submit Request Answer Provide Feedback