ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM
ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM
3rd Edition
ISBN: 9781264452545
Author: SMITH
Publisher: MCG
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Chapter 8.8, Problem 8.31P
Interpretation Introduction

(a)

Interpretation:

The boiling point of the solution formed upon the addition of 2 mol sucrose to one kilogram of water is to be determined.

Concept introduction:

The effect of the addition of a non-volatile component to a solvent is that there is an increase in the boiling point. This is called elevation in boiling point. Such an increase is observed since the surface of the solvent is saturated with solute particles. This results in the lesser escape of gaseous molecules and hence the vapor pressure of the solution gets lowered compared to the vapor pressure found above the pure solvent to which no solute has been added.

The temperature at which the vapor pressure of solution becomes equal to the atmospheric pressure is known as the boiling point. Due to the lesser vapor pressure, the solution needs to be heated to higher temperatures in order to boil it. Therefore, the boiling point of the solution is elevated.

One mole of the nonvolatile solute increases the boiling point of one kilogram of water by 0.51 °C.

The extent of elevation in boiling point is directly proportional to the amount of non-volatile solute added. For example, NaCl dissociates to give Na+ and Cl. Since there are two particles per mole of NaCl, it increases the boiling point calculated as follows:

  Elevation in boiling point(°C)=2(0.51 °C)=1.02 °C

The formula to calculate the number of moles from the mass is given as follows:

  Number of  moles=given mass(g)molar mass(g/mol)

The formula to calculate the molality is as follows:

  Molality(mol/kg)=Number of  molesMass of solvent(kg)

The formula to calculate the elevation in boiling point is as follows:

  ΔTb=Kbm

The formula to calculate the molarity is as follows:

  Molality(mol/kg)=Number of  molesMass of solvent(kg)

The formula to calculate ΔTb is as follows:

  ΔTb=Tb0Tb

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Chapter 8 Solutions

ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM

Ch. 8.3 - Use the solubility rules to predict whether the...Ch. 8.3 - Use the solubility rules for ionic compounds to...Ch. 8.4 - Why does a soft drink become "flat" faster when it...Ch. 8.4 - Predict the effect each change has on the...Ch. 8.5 - A commercial mouthwash contains 4.3 g of ethanol...Ch. 8.5 - What is the weight/volume percent concentration of...Ch. 8.5 - Prob. 8.17PCh. 8.5 - Prob. 8.18PCh. 8.5 - Prob. 8.19PCh. 8.5 - Prob. 8.20PCh. 8.5 - What is the concentration in parts per million of...Ch. 8.6 - Prob. 8.22PCh. 8.6 - Prob. 8.23PCh. 8.6 - Prob. 8.24PCh. 8.6 - Prob. 8.25PCh. 8.6 - How many grams of NaCl are contained in each of...Ch. 8.6 - How many milliliters of a 0.25 M sucrose solution...Ch. 8.7 - What is the concentration of a solution formed by...Ch. 8.7 - Prob. 8.29PCh. 8.7 - Prob. 8.30PCh. 8.8 - Prob. 8.31PCh. 8.8 - Prob. 8.32PCh. 8.8 - Prob. 8.33PCh. 8.9 - Prob. 8.34PCh. 8.9 - Prob. 8.35PCh. 8.9 - Prob. 8.36PCh. 8 - Prob. 8.37PCh. 8 - Prob. 8.38PCh. 8 - Prob. 8.39PCh. 8 - Prob. 8.40PCh. 8 - Classify each of the following as a solution,...Ch. 8 - Classify each of the following as a solution,...Ch. 8 - Prob. 8.43PCh. 8 - Label each diagram as a strong electrolyte, weak...Ch. 8 - Prob. 8.45PCh. 8 - Prob. 8.46PCh. 8 - Prob. 8.47PCh. 8 - Prob. 8.48PCh. 8 - Consider a mixture of two substances shown in blue...Ch. 8 - Which diagram (C or D) best represents what occurs...Ch. 8 - If the solubilityofKClin 100 mL of H2O is 34 g at...Ch. 8 - If the solubilityofsucrosein 100 mL of H2O is 204...Ch. 8 - Prob. 8.53PCh. 8 - Prob. 8.54PCh. 8 - Using the ball-and-stick model for methanol...Ch. 8 - Prob. 8.56PCh. 8 - Prob. 8.57PCh. 8 - Prob. 8.58PCh. 8 - Prob. 8.59PCh. 8 - Prob. 8.60PCh. 8 - Prob. 8.61PCh. 8 - Prob. 8.62PCh. 8 - Prob. 8.63PCh. 8 - How is the solubility of helium gas in water...Ch. 8 - Use the solubility rules listed in Section 8.3B to...Ch. 8 - Use the solubility rules listed in Section 8.3B to...Ch. 8 - Prob. 8.67PCh. 8 - Prob. 8.68PCh. 8 - Prob. 8.69PCh. 8 - Prob. 8.70PCh. 8 - Prob. 8.71PCh. 8 - Prob. 8.72PCh. 8 - Prob. 8.73PCh. 8 - Prob. 8.74PCh. 8 - How would you use a 250-mL volumetric flask to...Ch. 8 - How would you use a 250-mLvolumetric flask to...Ch. 8 - Prob. 8.77PCh. 8 - Prob. 8.78PCh. 8 - Prob. 8.79PCh. 8 - Prob. 8.80PCh. 8 - Prob. 8.81PCh. 8 - What is the molarity of a 20.0% (v/v) aqueous...Ch. 8 - Prob. 8.83PCh. 8 - Prob. 8.84PCh. 8 - Prob. 8.85PCh. 8 - Prob. 8.86PCh. 8 - Prob. 8.87PCh. 8 - Prob. 8.88PCh. 8 - Prob. 8.89PCh. 8 - Prob. 8.90PCh. 8 - Prob. 8.91PCh. 8 - Prob. 8.92PCh. 8 - What is the boiling point of a solution that...Ch. 8 - Prob. 8.94PCh. 8 - If 150 g of ethylene glycol (C2H6O2) is added to...Ch. 8 - Prob. 8.96PCh. 8 - Prob. 8.97PCh. 8 - Prob. 8.98PCh. 8 - Which solution in each pair has the higher melting...Ch. 8 - Prob. 8.100PCh. 8 - A flask contains two compartments (A and B) with...Ch. 8 - A flask contains two compartments (A and B) with...Ch. 8 - Prob. 8.103PCh. 8 - Explain why more sugar dissolves in a cup of hot...Ch. 8 - If the concentration of glucose in the blood is...Ch. 8 - Prob. 8.106PCh. 8 - Mannitol, a carbohydrate, is supplied as a 25%...Ch. 8 - A patient receives 750 ml, of a 10.% (w/v) aqueous...Ch. 8 - Explain why a cucumber placed in a concentrated...Ch. 8 - Explain why a cucumber placed in a concentrated...Ch. 8 - Prob. 8.111PCh. 8 - Prob. 8.112PCh. 8 - Prob. 8.113PCh. 8 - Prob. 8.114PCh. 8 - Prob. 8.115PCh. 8 - Prob. 8.116PCh. 8 - The therapeutic concentration—the concentration...Ch. 8 - Prob. 8.118CP
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY