You have to make 100 mL of a solution of GABA at a concentration of 10-6 M. How much GABA (in µg) do you need?
You have to make 100 mL of a solution of GABA at a concentration of 10-6...
For a behavior experiment, you want to test the effect of injected GABA. How much of a 2x10-4 M GABA solution do you have to inject into a 60 g crayfish to reach a concentration of 10-5 M in the hemolymph of the crayfish?
Question 6 Using stock solutions to make up a solution: from final concentration to volume You need to digest a sample of DNA with a restriction enzyme. You will do this reaction later in the semester. The buffer for this reaction has a final concentration of 40 mM Tris, pH 7.5, 10 mM MgCl2 and 50 mM KCl. You have the following stock solutions: 0.5 M Tris, pH 7.5, 1 M MgCl2 and 2 M KCl. How would you make...
A 100 mL solution needs to have a concentration of 36.50 mg/mL of pure Sodium Salicylate. Using a batch of sodium salicylate with a 95.5% assay, how many grams (g) of sodium salicylate do you need to achieve the desired concentration for a 100 mL solition?
Question 2 Expressing concentration in different units You have a 0.2 M solution of a compound (molecular weight 200) a) How many mmoles are there in the following volumes? i. 2 mL ii. 5 mL ii. 10 mL iv. 100 mL b) Express this concentration in the following units: i. mM; iii. iv. %(w/v); mg/dL; c) How much of this compound would you have to weigh out if you were to make up 100 mL of the solution? d) If...
Assume that you have a stock solution of epinephrine at a concentration of 3 mg/mL. Knowing that the pipette you will use delivers 20 drops/mL, calculate the number of drops of the stock solution that must be added to a smooth muscle bath containing 27 mL of Locke’s solution so that the final concentration of epinephrine in the muscle bath will be 173 µg/mL.
You need 100 mL of a 0.00057 M solution for an experiment. You are given 10 mL of a 5.7 M stock solution. What is the best method to get the final volume and concentration you for trial? -It is not possible to reach that concentration with the info presented. -Use a 1.0 mL volumetric pipette and then dilute with water to 100 mL, then repeat serially until the desired concentration is reached. -Use a graduated cylinder to measure 0.1...
1) A stock solution has a concentration of 100 µg/mL. If 20 µL of stock is added to a beaker. What is the mass of the dye in µg? 2) If the absorbance of the same dye (after diluted with water to 3 mL) is 0.3 AU, what is A/µg of the dye used?
If I have an 85% concentration of lactic acid (w/w) how much do I need to make 300 mL of a 200g/L solution?
you have a 2 ml solution of CHO cells at a concentration of 5.6 x 10^4 cells/mL and need to produce a solution of 56 cells/mL set up detailed serial dilution given 8mL of 4.1 x10^3 cells/ML and need approximitly 100 cells/mL. set up detailed serial dilution by determining the aliquot to be transfered (v1) from the solution to get 100 cells/mL in a final volume of 10 mL given 10mL cell suspension of NIH cells at 3.8 x10^5 cells/ML...
You have a stock solution of FastGreen at a concentration of 10 ug/ml. What volumes of solution and water do you need to mix to obtain 400 ul of a 2 ng/ul solution? (Show ALL calculations)