
1. A stock solution of blue dye has a concentration of 4.0 x 10 M. If...
The stock solution for yellow dye #28 is 5.6 x 10-3 M. If 8.00 mL of water is mixed with 2.00 mL of the stock solution, what is the molarity of the new solution? O 1.4 x 10-3M O 1.12 x 10-3M 1.1x10-3M 4.5 x 10-3M
QUESTION 1 A food dye solution has a dye concentration of 2.5 x 10- M. If 3.0 mL of this dye solution is diluted to 15.0 mL, what is the concentration of the diluted solution? O 1.7 x 10-6 M 07.5 x 10-6 M O 7.5 x 10-5 M 2.5 x 10-5M 5.0 x 10-6 M
4.34 mL of a dark blue solution with a dye concentration of 12.31%m/vis diluted to a total volume of 137. ml. What is the new concentration of the solution in units of %m/v? Do not include units in your answer.
A stock solution of Blue #1 has a concentration of 1.744 M. 4 mL of this solution is diluted with 8 mL water. What is the concentration of the resulting solution? Provide your response to 3 significant figures.
A stock solution of 1.24 x 10-4 M dye is available in the labo- ratory. What volume of the stock solution must be transferred to the volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.00 x 10^M? Perhaps the volume in question 2 is an inconvenient frac- |tional amount. What volume should the analyst dispense to simplify the preparation of the dilution?
2. A stock solution of 1.24 x 10^-4 M dye is available in the laboratory. What volume of the stock solution must be transferred to the volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.00 x 10^-5 M? 3. Perhaps the volume in question 2 is an inconvenient fractional amount. What volume should the analyst dispense to simplify the preparation of the dilution?
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?
Given a stock solution of yellow #5 with a concentration of 2.9 x 10-4 M, calculate the concentration of yellow #5 in the 4 prepared solutions (A thru D) assuming you perform these dilutions exactly as required in the procedure of this lab. 50 mL Beaker Dye stock solution 1:1 Ethanol/Water solvent A 1.00 mL 9.00 mL B 3.00 mL 7.00 mL C 5.00 mL 5.00 mL D 7.00 mL 3.00 mL
1. Serial dilution Questions: a) (5 pts) Suppose you begin with stock solution of dye that has a concentration of 350.0 mg/L and do the following set of serial dilutions on it: 5.00 mL of stock diluted to a total volume (TV) of 500.00 mL (Dilution 1); 2.00 mL of Dilution 1 is then diluted to a TV of 250.00 mL (Dilution 2); finally, 1.00 mL of Dilution 2 is then diluted to a total volume of 100.00 mL. Calculate...
The concentration of dye in Solution A is 20.926 M. A serial dilution is performed to make Solutions B and C. In the first dilution, 7 mL of Solution A is diluted with 12 mL water to make Solution B. Then, 2 mL of Solution B is then diluted with 1 mL of water to make Solution C. What is the concentration of dye in Solution C? Provide your response to three significant figures in units of molarity.