(a)
Interpretation:
The preparation of the given solutions using pure solute and wateris to be explained.
Concept Introduction:
The number of moles is calculated by the formula,
Answer to Problem 7.42E
Explanation of Solution
The number of moles of
The above formula can be written as follows:
The given volume and molarity is
Substitute the values of volume and molarity in equation (1).
Thus, the number of moles of
The amount of
The molar mass of
Substitute the value of molar mass in the given formula.
Thus, the amount of
Hence,
(b)
Interpretation:
The preparation of the given solutions using pure solute and water is to be explained.
Concept Introduction:
The number of moles is calculated by the formula,
Answer to Problem 7.42E
Explanation of Solution
The number of moles of
The above formula can be written as follows:
The given volume and molarity is
Substitute the volume and molarity in equation (1).
Thus, the number of moles of
The amount of
The molar mass of
Substitute the value of molar mass in the given formula.
Thus, the amount of
Hence,
(c)
Interpretation:
The preparation of the given solutions using pure solute and water is to be explained.
Concept Introduction:
The concentration of the solution in
Answer to Problem 7.42E
Explanation of Solution
The concentration of the solution in
The given value of
Substitute the value of
Hence, the mass of solute is
Mass of solvent is calculated as follows:
Substitute the mass of solute and solution in above formula.
Thus, the mass of solvent (water) is
Therefore,
(d)
Interpretation:
The preparation of the given solutions using pure solute and water is to be explained.
Concept Introduction:
The concentration of the solution in
Answer to Problem 7.42E
Explanation of Solution
The concentration of the solution in
The given value of
Substitute the value of
Hence,
Want to see more full solutions like this?
Chapter 7 Solutions
Chemistry for Today: General, Organic, and Biochemistry
- The freezing point of a 0.21 m aqueous solution of H2SO4 is -0.796C. (a) What is i? (b) Is the solution made up primarily of (i) H2SO4 molecules only? (ii) H+ and HSO4- ions? (iii) 2H+ and 1SO42- ions?arrow_forwardSodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water, by calculating the freezing point depression of solutions containing 200. g of each salt in 1.00 kg of water. (An advantage of CaCl2 is that it acts more quickly because it is hygroscopic, that is. it absorbs moisture from the air to give a solution and begin the process. A disadvantage is that this compound is more costly.)arrow_forwardConsider three test tubes. Tube A has pure water. Tube B has an aqueous 1.0 m solution of ethanol, C2H5OH. Tube C has an aqueous 1.0 m solution of NaCl. Which of the following statements are true? (Assume that for these solutions 1.0m=1.0M.) (a) The vapor pressure of the solvent over tube A is greater than the solvent pressure over tube B. (b) The freezing point of the solution in tube B is higher than the freezing point of the solution in tube A. (c) The freezing point of the solution in tube B is higher than the freezing point of the solution in tube C. (d) The boiling point of the solution in tube B is higher than the boiling point of the solution in tube C. (e) The osmotic pressure of the solution in tube B is greater than the osmotic pressure of the solution in tube C.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningGeneral, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning