Chemistry Assessment1. Equal numbers of moles of two soluble substances; A & B, are dissolved into 1 L of waterseparately. Explain the following:a) The Water samples are cooled down. Solution A freezes at -0.5°C and B at -1°C. Howthese solutions can have different freezing points?b) Compare the freezing point of 500 mL of solution B with the 1 L of solution A.c) Calculate the molality of the solution A & B assuming i=1 for substance A.d) Describe the change of freezing point if you add 1 Kg of water into solution B.e) What would be the concentrations of A & B if they have the freezing point of -0.05°C?f) Compare the all-other colligative properties of the original solutions of A & B.2. Ammonium hydrogen sulfide, NH,HS, is unstable at room temperature and decomposes:NH,HS(s) + NH3(3) + H2S(3)If you place some solid Ammonium hydrogen sulfide in the closed flask, in which of thefollowing case it will produce less hydrogen sulfide gas-a) Removing some ammoniab) Adding some ammoniac) Removing some Ammonium hydrogen sulfided) Increasing the pressure in the flaskExplain your answer in each case.

" Since there are multiple question, and it is not mentioned which is to be solved, iam solving only…

Chemistry Assessment 1. Equal numbers of moles of two soluble substances; A & B, are dissolved into 1 L of water separately. Explain the following: a) The Water samples are cooled down. Solution A freezes at -0.5°C and B at -1°C. How these solutions can have different freezing points? b) Compare the freezing point of 500 mL of solution B with the 1 L of solution A. c) Calculate the molality of the solution A & B assuming i=1 for substance A.

Chemistry Assessment 1. Equal numbers of moles of two soluble substances; A & B, are dissolved into 1 L of water separately. Explain the following: a) The Water samples are cooled down. Solution A freezes at -0.5°C and B at -1°C. How these solutions can have different freezing points? b) Compare the freezing point of 500 mL of solution B with the 1 L of solution A. c) Calculate the molality of the solution A & B assuming i=1 for substance A.

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter13: Solutions And Their Behavior

Section: Chapter Questions

Problem 107SCQ

See similar textbooks

Similar questions

A solution is made by dissolving 34.0 g of NaCl in 100 g of H2O at 0C. Based on the data in Table 8-1, should this solution be characterized as a. saturated or unsaturated b. dilute or concentrated
The Henry's law constant for the solubility of argon gas in water is 1.0103M/atm at 30C. (a) Express the constant in M/mm Hg. (b) If the partial pressure of argon gas at 30C is 693 mm Hg, what is the concentration (in M) of the dissolved argon gas at 30C? (c) How many grams of argon gas can be dissolved in 29 L of water at 693 mm Hg and 30C? (Ignore the partial pressure of water.)
Air contains 78% nitrogen. At 25C, Henry's law constant for nitrogen is 6.8104M/atm, while at 37C, it is 6.2104M/atm. (a) How many milligrams of the nitrogen in the air will dissolve in 3.0 L of water at 25C? The air in the head space above the water has a pressure of 1.38 atm. (b) How many milligrams of the nitrogen in the air will dissolve in 3.0 L of water at 37C? The air in the head space above the water has a pressure of 1.38 atm. (c) How much more nitrogen is dissolved at the lower temperature in mass percent?
A solution is made by dissolving 0.455 g of PbBr2 in 100 g of H2O at 50C. Based on the data in Table 8-1, should this solution be characterized as a. saturated or unsaturated b. dilute or concentrated
Graph Table 14.10 shows solubility data that was collectedin an experiment. Plot a graph of the molarity ofKI versus temperature. What is the solubility of KI at55°C?
A patient has a “cholesterol count” of 214. Like manyblood-chemistry measurements,this result is measured inunits of milligrams per deciliter (mgdL1). Determine the molar concentration of cholesterol inthis patient’s blood, taking the molar mass of cholesterolto be 386.64gmol1. Estimate the molality of cholesterol in the patient’sblood. If 214 is a typical cholesterol reading among men inthe United States, determine the volume of such bloodrequired to furnish 8.10 g of cholesterol.
Solutions Introduced directly into the bloodstream have to be isotonic with blood; that is, they must have the same osmotic pressure as blood. An aqueous NaCl solution has to be 0.90% by mass to be isotonic with blood. What is the molarity of the sodium ions in solution? Take the density of the solution to be 1.00 g/mL.
Refer to Figure 13.10 ( Sec. 13-4b) to answer these questions. (a) Does a saturated solution occur when 65.0 g LiCl is present in 100 g H2O at 40 C? Explain your answer. (b) Consider a solution that contains 95.0 g LiCl in 100 g H2O at 40 C. Is the solution unsaturated, saturated, or supersaturated? Explain your answer. (c) Consider a solution that contains 50. g Li2SO4 in 200. g H2O at 50 C. Is this solution unsaturated, saturated, or supersaturated? Explain your answer. Figure 13.10 Solubility of ionic compounds versus temperature.
In the lab, you dissolve 179 g of MgCl2 into1.00 L of water. Use Table 14.6 to find the freezing pointof the solution.