What is the molality of a 1.10 M NaF solution with a density of 1.23 g/mL?     1.10 m      5.85 m     0.894 m     2.34 m     0.929 m

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 17PP
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What is the molality of a 1.10 M NaF solution with a density of 1.23 g/mL?

   

1.10 m 

   

5.85 m

   

0.894 m

   

2.34 m

   

0.929 m

Expert Solution
Step 1

The mole of solute present in one kilogram of the solvent is known as molality. The mole of solute present in a one-liter solvent is known as molarity. The relation between molality and molarity is as follows:

Chemistry homework question answer, step 1, image 1

Where m= molarity of the solution = 1.10 M

d = density of the solution = 1.23 g/mL

m = molality of the solution =?

mB = molar mass of solute

We know that the molar mass of NaF is = 41.988 g/mol

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