You have an unusual order for intravitreal ceftazidime 2.25mg/0.1 ml. Your pharmacy has ceftazidine already in solution at 100mg/ml. Using 1 ml of that ceftazidine, how many milliliters of sodium chloride 0.9% would you have to add to prepare the proper concertation?

Your team is asked to make up a 200mL agarose gel, 1%, in 1XTAE containing 0.5ug/mL of ethidium bromide. You have the following stock reagents: 50XTAE, 10mg/mL ethidium bromide, powder agarose and deionized water. Please calculate the following: 1. Amount of agarose, 2. Volume of 50X TAE, 3. Volume of 10mg/mL ethidium bromide, 4. Volume of dei water

Experimental set up While you are waiting (20 minutes), complete the following exercise: (a) List the initial locations (inside or outside the bag) of all of the molecules that are available for osmosis through the membrane, and then LABEL them in the picture below: (b) For each molecule you listed in (a), PREDICT their direction of net (overall) diffusion: into the bag, out of the bag, both into and out of the bag equally, or none (will not diffuse across the membrane). State your reason for each prediction. 7. After 20 minutes, remove the tubing. 8. Test the bag contents for presence of barium cloride ( White barium sulfate precipitate forms in magnesium sulfate presence). 9. Test the beaker contents for presence of iodine. Record your observation in your data table. Data table Barium cloride test for solution in membrane Iodine test for solution in test tube

The liquids to be studied in this experiment are water and aqueous solutions of CTAB. CTAB solutions should be measured at concentrations of 10-5, 10 - 4, 3x 10-4, 8 x10-4, 2 x10-34 x 10-3 M and 10-2 M. Prepare a table with the calculated mass of CTAB required to make up the two most concentrated solutions and a separate table with the mass of concentrated solution required to prepare the dilute solutions. (Assume that you are using, 1000 ml volumetric flasks for the most dilute solutions and 500 ml volumetric flasks for the remainder)