Additional Activities 1. Briefly explain why water is considered as the universal solvent 2. Using the concept of IMFA, account for the difference in boiling point and melting point of the following molecular substances: Substance Boiling point (°C) Melting point (C) Helium gas, He -269 -272 Methane, CH4 -162 -184 100 Ethanol, C&H5OH 78 -117

Q: The melting temperature of a compound A is 280K at 2kPa with an enthalpy of melting of 100J/mol.…

A: The objective is to determine the-temperature at which (l)−(s) are in equilibrium,0.65solute…

Q: Explain the concept of boiling point elevation and freezing point depression and give an example or…

A: Boiling point elevation and freezing point depression are the colligative properties of solutions.

Q: a) How could you calculate a water pressure above a 1M NaCl solution (salt in water)? Could you…

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Q: Students are investigating a solvent for use in freezing point depression experiments. They measured…

A: Given : Freezing point of solvent = -12.6 oC Freezing point of solution = -18.3 oC Mass of solute…

Q: some solvent has a normal boiling point of 75 C. What is the vapor pressure (in mm Hg) at 150 C if…

A: The question is based on the concept of chemical kinetics. we need to calculate vapour pressure at…

Q: Hot apple cider is often flavored with cloves, giving the beverage a distinctive aroma. One of the…

A: Given:

Q: The term hydrophobic means     miscible in water   reacting violently with aqueous solutions…

A: Depending upon the affection toward water substances are classified as hydrophilic or hydrophobic.…

Q: If 180 g of KNO3 is dissolved in 300 g of water at the same temperature, would the solution be…

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Q: distance between the two species decreases?

A: According to Coulomb's law, the magnitude electrostatic force between the two charges is directly…

Q: If acetone is miscible with both water and xylene, then why can’t all three form a clear single…

A: "Like dissolves Like" which means polar solute dissolves in polar solvents and non- polar solute…

Q: Calculate the vapor pressure lowering of a solution containing 45 g of Gypsum (with molar mass of136…

A: According to Raoult's law, when solute B is added to the pure solvent A, the vapor pressure of A…

Q: Calculate the mass of ethylene glycol (C2H6O2) that must be added to 1.00 kg of ethanol (C2H5OH) to…

A: When we add non volatile solute in a pure solvent than the vapour pressure of pure solvent decreases…

Q: The vapor pressure of benzene, C6H6, is 73.03 mmHg at 25.0 °C. How many grams of testosterone…

A: In this question, we want to calculate the mass of the testosterone in grams. How we can calculate,…

Q: Determine the lattice energy of NaCl(s), using the data provided.

A: This question can be solved using the Born-Haber cycle equation. Given, Sublimation energy = 109.0…

Q: What is are the two key structural parts, one hydrophobic and the other hydrophilic, of a soap…

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Q: Write Short paragraph about heterogeneous coloidal solution.

A: A colloid is a heterogeneous mixture in which dispersed particles have an intermediate size of…

Q: Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences,…

A: Given information, Boiling point of Acrylonitrile and ethyl acetate are same i.e. 77.2°C.

Q: 17. Which would be more effective in increasing the boiling point of 500.0 g water? A. 100.0 g…

A: Ans) 100g table salt, NaCl

Q: Determine the molar mass of a solute from the boiling point of a solution. In a laboratory…

A: Mass of unknown compound = 26.07 gWeight of C2H5OC2H5 = 213.2 g = 0.2132 kgBoiling point of…

Q: Students are investigating a solvent for use in freezing point depression experiments. They measured…

A: On adding non-volatile solute to pure solvent, the freezing    point of the solution becomes…

Q: Enumerate the procedures/processes in the determination of water hardness.

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Q: · In general, under room temperature, which of the following type(s) of solid(s) would not dissolve…

A: The network covalent solids ate the solids that are insoluble in any kind of solvent. Therefore…

Q: Describe how fractional distillation can better purify a mixture of liquids by discussing a liquid…

A: To achieve a desired degree of separation of a mixture of liquids, the general method involves…

Q: Calculate the mass of oxygen dissolved in 110.0 L of water at 25 °C at a total pressure of 1 atm and…

A: Volume of water = 110.0 LTotal pressure = 1 atmMole fraction of oxygen = 0.31Henry's law constant =…

Q: The vapor pressure of ethanol is 54.68 mm Hg at 25°C. How many grams of testosterone, C19H28 O2, a…

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Q: Use the following data to calculate the combined heat of hydration for the ions in potassium bromate…

A: Hsolution  + Hhydration

Q: For the following, remember that the boiling point elevation constant for water is Kb = 0.512 C/kg,…

A: Given data:  Mass of MgCl2 = 250 g  Molar mass of MgCl2 = 95.211 g/ mol Therefore,  Moles of MgCl2…

Q: (a) Describe the arrangement of molecules in solid, liquid, and gas.

A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…

Q: Describe the difference between solvation of ionic compounds and solvation of covalent compounds.…

A: A covalent compound is a substance that is made up of two or more atom By sharing electrons, a…

Q: where does this formula come from?

A: In this question we have to derive the given formula, which is based on Bragg's law,

Q: State a reason of the following statement: (i) Soap do not work in hard water. (ii) The use of the…

A: (i) Soaps are the sodium and potassium salts of higher fatty acids. When soap is dissolved in hard…

Q: seawater sample contains 2.5% NaClNaCl (MW=58.44 g/mol) by mass. Calculate the normal boiling point…

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Q: A student was instructed to determine the molecular weight of an unknown white powder. He remembered…

A: The student may proceed through property of solution that is colligative property.and it can be used…

Q: The vapor pressure of a mixture of 400g of carbon tetrachloride and a 43.3 g of an unknown compound…

A: Given,  The vapor pressure of a mixture of 400g of carbon tetrachloride and a 43.3 g of an unknown…

Q: At ordinary temperatures, water is a poor solvent for or-ganic substances. But at high pressure and…

A: The vapour pressures ( P1 and P2) of a liquid measured at temperatures ( T1 and T2) are related to…

Q: A certain substance X condenses at a temperature of 108.9°C. But if a  950.g sample of X is…

A: Since condensation point is equivalent to boiling point. So we used the colligative property…

Q: Calculate the heat associated with the dissolution of 0.1 mole of NaI in water. The lattice energy…

A: The amount of energy produced when one mole gaseous ions are diluted is known as hydration energy.…

Q: A solution prepared from 7.25 g of an organic compound in 97.0 g of benzene has a boiling point of…

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Q: What is the normal boiling point of this solvent?

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Q: Explain how soaps or surfactants decrease the surface tension of a liquid. How does the meniscus of…

A: It is given that the surface tension of a liquid decreases with the soaps and surfactants.We have to…