How would you prepare 500 ml of 0.02% methylene blue dye starting from 1% stock?
How would you prepare 500 ml of 0.02% methylene blue dye starting from 1% stock?
How would you prepare 77 mL of a solution 0.02 M from a stock solution of 1.3 M ? (the volume of the water added is only an estimation. It would be correct if the density of the solution is equal to the density of the solvent, which is never the case, however the error in this case is quite small). V of the stock solution = ? V of water added ≈?
based on chromatographic methods lab which dye ( methylene blue and methylene orange) is more polor ? how did you distinguish between chlorophyll a nad chlorophyll b in your TLC analysis ? which structural feature of the molecule accounts for this observation ? compare and contrst your TLC results whe n100% acetone was used vs when 100% hexane was used what do your result suggest the polarities of the dyes in spinach ?
how would you prepare a stock solution of 0.100 M solution of MgCl2 in 500 mL? Using the stock solution, how would you make a 0.078 M solution in 25.00 mL?
How would you prepare 500 mL of a 5% D5W (dextrose in water) solution from a 29% stock solution?
1. A stock solution of blue dye has a concentration of 4.0 x 10 M. If 8.00 mL water is added to 2.00 mL of the blue dye stock solution, what is the concentration of the new solution?
Assume that you have a stock solution of 22 mM azure A (blue dye), and water. Using the micropipettors provided, make up 2 ml of 600 μM azure What procedure would you use to do this?
18. You are asked to prepare a pH = 8.60 buffer starting from 500 mL of 0.10 M solution of hydrocyanic acid, HCN, and excess sodium cyanide, NACN. (Ka for HCN = 4.9 x 10-10) a) What is the pH of the hydrocyanic acid solution prior to adding NACN? b) How many grams of NaCN should be added to prepare the buffer solution?
How would you prepare 40.0 mL of 0.800 M HNO3 from a stock solution of 4.00 M HNO3? What volume (in mL) of the 4.00 M HNO3 solution will you need? ?mL
How would you prepare 2 L of 1 MMgCl2 from a 4 MMgCl2 stock solution? Add 500 mL of the 4 M MgCl2 stock solution to enough distilled water for a total volume of 2 L of solution. Add 2000 mL of the 4 M MgCl2 stock solution to enough distilled water for a total volume of 2 L of solution. Add 250 mL of the 4 M MgCl2 stock solution to enough distilled water for a total volume of...
) 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.