Anna Divi, a young and ambitious researcher, is planning to put up her very own research laboratory. However, she does not have the funds for this to happen. She then approached Alan Read, CEO of a well-known funding agency, to help her pursue her dream laboratory. Before Alan considers Anna's proposal, Anna must perform an experiment on determining the melting point of solutions. She must have an accurate result with a percent error not greater than 3%. The data on the experiment is given below. Help Anna achieve her goals by performing the necessary calculations below. Table 1. Data on the determination of the melting point of the solution. Parameters Values Theoretical freezing 65.8 point of solvent, °C Freezing point depression constant (kf 2.49 of solvent, °C m1 mass of solute, g 0.250 mass of solvent, g 2.100 molar mass of solute, g mol1 148.21

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Chapter11: Properties Of Solutions
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II. A Study of Intermolecular Forces of Attraction
Anna Divi, a young and ambitious researcher, is planning to put up her very own
research laboratory. However, she does not have the funds for this to happen. She
then approached Alan Read, CEO of a well-known funding agency, to help her pursue
her dream laboratory. Before Alan considers Anna's proposal, Anna must perform an
experiment on determining the melting point of solutions. She must have an accurate
result with a percent error not greater than 3%. The data on the experiment is given
below. Help Anna achieve her goals by performing the necessary calculations below.
Table 1. Data on the determination of the melting point of the solution.
Parameters
Values
Theoretical freezing
point of solvent, °C
65.8
Freezing point
depression constant (ke) 2.49
of solvent, 'C m1
0.250
mass of solute, g
mass of solvent, g
2.100
molar mass of solute, g
148.21
mol
Transcribed Image Text:II. A Study of Intermolecular Forces of Attraction Anna Divi, a young and ambitious researcher, is planning to put up her very own research laboratory. However, she does not have the funds for this to happen. She then approached Alan Read, CEO of a well-known funding agency, to help her pursue her dream laboratory. Before Alan considers Anna's proposal, Anna must perform an experiment on determining the melting point of solutions. She must have an accurate result with a percent error not greater than 3%. The data on the experiment is given below. Help Anna achieve her goals by performing the necessary calculations below. Table 1. Data on the determination of the melting point of the solution. Parameters Values Theoretical freezing point of solvent, °C 65.8 Freezing point depression constant (ke) 2.49 of solvent, 'C m1 0.250 mass of solute, g mass of solvent, g 2.100 molar mass of solute, g 148.21 mol
A. Calculate the molality of the solution.
B. Calculate the theoretical freezing point of the solution.
C. Anna performed the same experiment from CHEM 18.1 where she
constructed the cooling curve of the solution. From the cooling curve, she
obtained the break temperature as 67 C and the arrest temperature as 65 °C.
Calculate the percent error of the freezing point of the solurtion.
D. Based on percent error, will Alan help Anna in funding the construction of
research laboratory?
Transcribed Image Text:A. Calculate the molality of the solution. B. Calculate the theoretical freezing point of the solution. C. Anna performed the same experiment from CHEM 18.1 where she constructed the cooling curve of the solution. From the cooling curve, she obtained the break temperature as 67 C and the arrest temperature as 65 °C. Calculate the percent error of the freezing point of the solurtion. D. Based on percent error, will Alan help Anna in funding the construction of research laboratory?
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