An aqueous solution of propyl alcohol is made by transfering 21.5 mL of liquid propyl alcohol to a 300.mL volumetric flask, and then adding enough water to fill the flask to the mark. What is the volume/volume percentage of propyl alcohol in the solution? Volume/volume percentage =_____ %
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An aqueous solution of propyl alcohol is made by transfering 21.5 mL of liquid propyl alcohol to a 300.mL volumetric flask, and then adding enough water to fill the flask to the mark. What is the volume/volume percentage of propyl alcohol in the solution?
Volume/volume percentage =_____ %
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- 1) 500 ml of .50 M NaC1 from 2.0 M original stock solution? 2) 2.0 L of .20M MgS04 from .50 M stock solution? 3)An unknown sample containing a mixture of NaCl and Na2CO3 was analyzed to determine the % composition of each compound. In the analysis for Na2CO3 (soda ash), the following data were obtained mass of unknown - 0.4436 g conc. of HCl used - 0.25 N initial volume - 0.5 mL final volume - 20.0 mL (MW soda ash) 106.12) 1.) What method was used to determine the concentration of HCl? 2.) What is the net volume of HCl used in the titration? 3.) What is % Na2CO3 in the given sample? NOTE: Round off your answer to a whole number (2 sig fig)A 10 ml of concentrated acetic acid was added in a sufficient quantity of water to make 350 ml of the acid solution. SG acetic acid= 1.05 kb acetate = 5.556x10^-10 What is the weight of acetic acid in grams? What is the molarity (mole/Liter) of acetic acid solution? What is the ka of acetic acid? What is the Hydronium ion concentration? What is the pH of the solution?
- A student prepares a stock solution of BaF2 by dissolving 50.00 g of a BaF2 in 1.00 L of water. An additional 2 drops of 37% (w/v%) HCI was added to acidify the solution. How many mL of the stock solution will be transferred to prepare a 100.00 mL solution with 0.10 M BaF2 solution? a. 38.05 mL b. 35.07 mL c. 380.5 mL d. 37. 50 mL e. None of the aboveDetermine the volume of glacial acetic acid to prepare 500 ml of a 0.020 M acetic acid solution (glacial acetic acid; strength 99.8%, density 1.05 g/ml, MW 60.05 g/mole).A researcher wants to determine the concentration of beta-carotene in carrots. She obtains a 0.558 M stock solution of beta-carotene and creates Dilution A by transferring 15.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 90.00 mL. She creates Dilution B by transferring 53.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 80.00 mL. She creates Dilution C by transferring 2.00 mL of Dilution B into a new container and diluting it with solvent to a final volume of 15.00 mL. What is the concentration in mM of Dilution C? use one decimal place
- A researcher wants to determine the concentration of beta-carotene in carrots. She obtains a 0.558 M stock solution of beta-carotene and creates Dilution A by transferring 15.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 90.00 mL. She creates Dilution B by transferring 53.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 80.00 mL. She creates Dilution C by transferring 2.00 mL of Dilution B into a new container and diluting it with solvent to a final volume of 15.00 mL. What is the concentration in mM of Dilution C? Report your answer with one place after the decimal. Remember to draw a dilution scheme!If 50mL of NaOH (mw=40g/mol) solution required 30mL of sulfuric acid (mw=98g/mol) solution in a titration and 30mL of sulfuric acid solution were required in the titration of 0.5038g of pure sodium carbonate (mw=106g/mol). What was the normality of the NaOH solution? (use 4 significant figures)In this station, you will find a sample of table salt; the chemical formula of table salt is NaCl. Using the balance, weigh out 6.00 g of NaCl and dissolve in 50 mL of deionized (d.i.) water. Once com-pletely dissolved, add additional d.i. water to make the final volume of solution 100.0 mL. What is the mass percent NaCl in the solution? What is the molarity of the solution
- A researcher wants to determine the concentration of beta-carotene in carrots. She obtains a 0.554 M stock solution of beta-carotene and creates Dilution A by transferring 23.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 99.00 mL. She creates Dilution B by transferring 59.00 mL of stock solution into a new container and diluting it with solvent to a final volume of 73.00 mL. She creates Dilution C by transferring 8.00 mL of Dilution B into a new container and diluting it with solvent to a final volume of 25.00 mL. She measures the absorbance of each solution and obtains the values below. Plot the data in a spreadsheet software and determine the best-fit line. What is the slope of the best-fit line? Report your answer with three places after the decimal. Remember to draw a dilution diagram! The best-fit line will likely look atrocious, since this is completely fictitious data. Solution Absorbance Stock solution 0.971 Dilution A…mass of dish 1631.5 g mass of dish and mix 1822 g mass of dish and agg. after extraction 1791g mass of clean filter 25 g mass of filter after extraction 30 g mass of agg. in 150 ml solvent 1.2g if Ac% 5% find the volume of the solventI need to make a solution containing 0.025 grams per liter. However, I do not want to weigh 0.025 grams and put this in one liter of solvent. I want to make a stock solution of 0.25 grams in 500 ml of solvent and take a unknown aliquot and dilute this in 500ml of solvent instead of 1000 ml of solvent. How do I calculate the volume of aliquot from the stock solution to achieve a final concentation of 0.025 grams per liter? What is the proper equation(s) required to figure out the proper aliquots required?