Please answer the following questions : 1) How many milliliters of a 1: 400 (w/v) stock solution should be used to make 4 liters of a 1:2000 (w/v) solution?
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Please answer the following questions :
1) How many milliliters of a 1: 400 (w/v) stock solution should be used to make 4
liters of a 1:2000 (w/v) solution?
2) What is the percentage strength of alcohol in a mixture of 3000 ml of 40 % v/v, 1000 ml of 60% and 1000 ml of 70 % v/v alcohol?
Please answer at your own words.
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- 5.00 ml of the 1.0 x 10-4 M CV stock solution is first diluted to 100.ml. Then 1.00 ml pf this solution is diluted again to 50.0 ml. What is the final concentration?You have a 20% stock of NaCl, a 30% stock of K2HPO4, 2.5 M NH4Cl and 10 mg/ml stock of ampicillin. a. How many grams of NaCl would you need to weigh out to make up 150 ml of a solution?b. You will be preparing 300 ml of media. You need to dilute this 20% stock of NaCl, the 30% stock of K2HPO4, the 2.5 M NH4 how much stocks you need to add. Fill in the table below. Stock Calculate Final Concentration needed ml added20% NaCl 1.5% ? 30% K2HPO4 2% ? 2.5 M NH4 Cl 0.1M ? 10 mg/ml ampicillin water 0.05 mg/ml ? water To 300 ml ?MULTIPLE CHOICE: Choose the letter of the best answer Please answer all questions correctly 1. The standardization of volumetric solution does not require hydrochloric acid. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 2. In the standardization of its volumetric solution, the primary standard is dried to constant weight, which means drying shall be continued until two consecutive weighings do not differ by more than 0.50 mg. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 3. In the standardization of its volumetric solution, potassium iodide was added to A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 4. Starch is the indicator of choice for these procedures because it forms intense blue coloration with the solution. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E. C and D 5. In the standardization of its volumetric solution, the reaction needs to be…
- Methyl salicylate Emulsion (Forbes Bottle Method)SOLVE FOR ITS WEIGHT/VOLUME REQUIRED TO MAKE 30 ML. SHOW COMPLETE SOLUTION. I NEED IT ASAP AND ANSWER THEM ALL FOR AN UPVOTE. COMPONENTS WEIGHT/ VOLUME REQUIRED Methyl salicylate Oil ? Acacia powder ? Purified water ? TO MAKE 30 mlPreparation of a standard solution of copper(II) sulfate pentahydrate 1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuSO4·5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4·5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so…Volumetric flasks show no intermediate gradations, but they show a single mark to indicate, with high precision, the volume they contain when they are filled to that mark. For most volumetric devices, "filled to the mark" means filled until the bottom of the meniscus of the contents is exactly coincident with the mark. In lab you prepared a standard solution having a concentration of 7 ppm. Using a buret, you transferred the required amount (7 mL) of the 40 ppm stock solution into a 100.0mL volumetric flask, added 2.0 mL sodium citrate solution, 2.0 mL of hydroquinone solution, 3 mL of phenanthroline solution, and diluted with distilled water to the mark. When you were finished, the final volume in your solution was 0.5cm above the mark. The solution you prepared is __________________ Question 7 options: less than 7 ppm because you added less solvent than necessary. greater than 7 ppm because you added less solvent than necessary. less than 7 ppm because you added more solvent than…
- How many grams of digoxin are needed to make 1500mL of a 0.5g in 200mL solution of digoxin? Give your answer to 2 decimal places. in grams 1000mL of sodium chloride 0.9% is to be given over 8 hours as an infusion. How many drops per minute are needed if using a standard giving set which delivers 20 drops/mL? Give your answer to the nearest whole drop. It is Saturday and you need to distribute 1000 flyers in 8 hours for the gig on Monday, on average every second person you ask takes a flyer, how many people per minute will you need to ask to deliver all the flyers in the 8 hours? Give your answer to the nearest whole number. people per minuteIf 500 mL of a 15% v/v solution of methyl salicylate in alcohol is diluted to 1500 mL, what is the percentage of strength v/v? 10% 5% 20% 2.5%Percentage or Ratio Strength Concentration.Show your complete solution. 1. If 250 mL of 15% (v/v) solution of methyl salicylate in alcohol is diluted to 1500 mL, what will be the percentage strength (v/v) of the final solution? *Note: Indicate the unit. Give your answer in 2 decimal places. Example 100.00 %
- 1. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1500 M CaCh2 Solve for the concentration of the stock solution in M. 2. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1200 g CaCl2 Solve for %w/v CaCl2 in the stock solution.What weight (in grams) of caffeine (C8H10O2N4) is required to prepare 100 mL each of the following solutions: 1) 0.1 M 2) 7% (w/v) 3) 100 ppm 4) 2mM (show solution)Hi, Can you please help me how to do thai question? Thank you! Prepare 100 ml of 1.0 M ammonia solution by diluting 25% ammonia solution (ρ = 0.910). How much should you pipette 25% ammonia into a 100 ml volumetric flask when making the solution?
