1. Find the mass percent of CaCl2 (110.98 g/mol) in a solution whose molarity is 1.45 M and whose density is 1.12 g/mL. 2. A 3.140 molal solution of NaCl is prepared. How many grams of NaCl (58.44 g/mol) are present in a sample containing 1.994 kg of water?
1. Find the mass percent of CaCl2 (110.98 g/mol) in a solution whose molarity is 1.45 M and whose density is 1.12 g/mL. 2. A 3.140 molal solution of NaCl is prepared. How many grams of NaCl (58.44 g/mol) are present in a sample containing 1.994 kg of water?
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter14: Mixtures And Solutions
Section14.2: Solution Concentration
Problem 14PP
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1. Find the mass percent of CaCl2 (110.98 g/mol) in a solution whose molarity is 1.45 M and whose density is 1.12 g/mL.
2. A 3.140 molal solution of NaCl is prepared. How many grams of NaCl (58.44 g/mol) are present in a sample containing 1.994 kg of water?
Expert Solution
Problem 1
given that,
Molarity = 1.45 M = 1.45 mol/ 1L
density = 1.12 g/mL
volume of the solution = 1L = 1000mL
mass of the solution = 1000mL x 1.12g/mL = 1120 g
moles of the solute = 1.45 moles CaCl2
mass of CaCl2=1.45 mol x 110.98g/mol = 160.921 g
mass percent of CaCl2=
mass percent of CaCl2 =
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