Concept explainers
Videos
Interpretation:
The amount of caffeine present in each layer after mixing it with methylene chloride and water needs to be determined in which it has distribution coefficient of 4.6 and 52 mg of caffeine are added to 2 mL of water and 2 mL of methylene chloride.
Concept Introduction:
A polar covalent molecule will be soluble in water whereas a non-polar covalent compound will be insoluble in water based on the concept of "Like dissolves like". Some of the polar compounds also not soluble in water as they cannot form hydrogen bonding with water molecules.
The distribution coefficient can be defined as the ratio of the amount of the substance dissolve in one solvent to the amount of substance in the other solvent.
Answer to Problem 1Q
The mass of caffeine in water and methylene chloride is 0.0427 g and 0.0093 g respectively.
Explanation of Solution
Distribution coefficientof caffeine = 4.6
Amount of caffeine = 52 mg = 0.052 g
Volume of water = 2 mL = 0.002 L
Volume of methylene chloride = 2 mL = 0.002 L
Let's assume the amount of caffeine in methylene chloride = x
Thus,
Thus,
Thus, the mass of caffeine in water and methylene chloride is 0.0427 g and 0.0093 g respectively.
Want to see more full solutions like this?
Chapter 3 Solutions
EBK A SMALL SCALE APPROACH TO ORGANIC L
- What mass of solid NaOH (97.0% NaOH by mass) is required to prepare 1.00 L of a 10.0% solution of NaOH by mass? The density of the 10.0% solution is 1.109 g/mL.arrow_forwardIf the CaCl₂ was available not as a solid, but rather as a 0.40 molar solution, how many mL of that solution should be used if you desire to make 1.0 grams of MgCl₂? Do not include units in your answer. Make sure your answer has at least 3 significant digits.arrow_forwardA chemist prepares a solution of aluminum sulfite (Al2(SO3)3) by measuring out 208. µmol of aluminum sulfite into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's aluminum sulfite solution. Round your answer to 3 significant digits. mmol L x10 X Ś ? oo E A olo Ar 8: >>arrow_forward
- Pipet (1.0x10^1) mL of a sample solution into a 250.00 mL volumetric flask and dilute to the mark with distilled water. Then, pipet 2 mL of this diluted solution into a 50.00 mL volumetric flask and dilute to the mark with distilled water. What is the dilution factor of the final solution? (Note: keep one decimal in your answer.)arrow_forwardYou are given a concentrated stock solution of 3.0 M sucrose, and you’re asked to do a serial dilution of 1:25, 1:10, and 1:5. What is the final concentration of sucrose (in mM) you achieve after these dilutions. Show your unit conversions step by steparrow_forwardOne of the most utilized IV (intravenous) fluids administered in medical settings is called D5W, which is a solution of 5.0% m/V dextrose in water. The concentration unit % m/V is defined as the mass of solute (in grams) per 100 mL of solution. 1. Calculate the mass of dextrose delivered to a patient if 250 mL of D5W were to be administered by IV.arrow_forward
- Q6:arrow_forwardA chemist has three different acid solutions. The first acid solution contains 20% acid, the second contains 40% and the third contains 85%. They want to use all three solutions to obtain a mixture of 140 liters containing 35% acid, using 2 times as much of the 85% solution as the 40% solution. How many liters of each solution should be used? The chemist should use liters of 20% solution, liters of 40% solution, and liters of 85% solution.arrow_forwardA total of 31.3 ml of 0.15 N NaOH was required to reach a phenolphthalein endpoint in titrating 6.00 g vinegar. Calculate the number of equivalents of acetic acid in vinegar. Calculate the number of grams of acetic acid present in the vinegar. Calculate the percent by weight of acetic acid in vinegar.arrow_forward
- how to separate a solid mixture of lithium bromide and barium carbonatearrow_forwardGive the mass of the solute and mass of the solvent for 1.30 LL of a solution that is 17.0 %% of Pb(NO3)2Pb(NO3)2 by mass (the density of the solution is 1.16 g/mLg/mL), starting with solid solute. Express your answers using three significant figures. Enter your answers numerically separated by a comma.arrow_forwardA Review A laboratory procedure calls for making 510.0 mL of a 1.2 M KNO3 solution. Part A How much KNO3 in grams is needed? Express your answer using two significant figures. ΠνΠ ΑΣφarrow_forward
World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning
Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax
Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning