mView2offset-next&assignmentProblemiD-95748830; Secure I https:/ CH 13Hw Item 3
ID: 593626 • Letter: M
Question
mView2offset-next&assignmentProblemiD-95748830; Secure I https:/ CH 13Hw Item 3 Calculate the molarity of the solution. Express the molarity to three signilficant figures. Constants 1 Poriodic Table An aqueous KNOs solution is made using 71.1 g of KNO3 diluted to a total solution volume of 2.05 L. (Assume a density of 1.05 g/mL for the molarity You may want to reference (Pages 586-592) Section 13.5 while completing this problom Submit Part B Calculate the molality of the solution Express the molality to three significant figures. molality Part C Caloulate the mass percent of the solution. Express the mass percent to three significant figures. MacBook Air r6 F7Explanation / Answer
molar mass of KNO3 = 39 + 14 + 3 * 16 = 101 gm/mol
Number of moles of KNO3 = Mass/molar mass = 71.1/101 = 0.70396 moles
molarity = number of moles of solute/Volume of solution in L
=> 0.70396/2.05
=> 0.34339M
molality = number of moles of solute/Mass of solvent in Kg
Mass of solvent = Volume of solvent * density = 2.05L * 1050 g/L = 2.1525 Kg
molality = 0.70396/2.1525 = 0.32704m
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.