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Compare the boiling and freezing points of 1m solution of glucose to a 1m solution of Cacl2. Why does CaCl2 have a higher boiling and a lower freezing Please explain not just say its 1m and then 3m?
Wiki User
∙ 9y ago
Boiling and freezing points are colligative properties, meaning they depend on the number of solute particles dissolve in solution. Glucose is a molecular compound so it is one particle dissolved in solution. CaCl2 will dissociate into three particles in solution. There are three times as many particles present in solution when CaCl2 dissolves.
Wiki User
∙ 9y ago
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Explain why molality is used for boiling point elevation and feezing point depression calculations and molarity is used for osmotic pressure calculations?
Molality is independent of temperature, so when you are trying to find changes in boiling and freezing points you need something that will stay constant regardless of the change in temperature. Molarity is temperature dependent and also is based on the volume of a solution, both of which are needed to calculate pressure using the ideal gas law, PV=nRT. Osmotic pressure is similar but we substitute the number of moles of the solution and the volume by using the molarity, you cannot do this with molality, since it is dependent on mass, not volume.
What may happen to the boiling point of a substance if there are impurities present. Explain in terms of the nature of impurities.?
it might decrease or increase depends on the impurities added.:D
2 Predict and explain what systems are electrically conducting a solid NaCl b molten NaCl c An aqueous solution of NaCl?
molten NaCl and An aqueous solution of NaCl will be conducting due to the presence of free ions in these.
Predict and explain which of the following systems are electrically conducters asolid Nacl bmolten Nacl can aqueous solution Nacl?
Molten NaCl and aqueous solution of NaCl will conduct elecctricity due to the presence of free (movable) ions.
Predict and explain what systems are electrically conducting e solid NaCl f molten NaCl g An aqueous solution of NaCl?
The aqueous and molten solutions are electrically conducting
Explain why a solution has a lower boiling point than the pure solvent?
Most solutions have a HIGHER boiling point than the pure solvent. A solution with a lower boiling point than the solvent has formed an azeotrope.
What kind of experiment would explain separation of salt water solution?
evaporation or boiling!!!
The freezing point and boiling point for matter is a constant Explain this meaning of constant?
It means that the freezing or melting points do not change, that they are always the same, depending on the type of matter. For eg. the melting point or freezing point of water is 0○ Celsius and the boiling point is always 100○C.
What is solution space explain?
There is no solution.
Explain why molality is used for boiling point elevation and feezing point depression calculations and molarity is used for osmotic pressure calculations?
Molality is independent of temperature, so when you are trying to find changes in boiling and freezing points you need something that will stay constant regardless of the change in temperature. Molarity is temperature dependent and also is based on the volume of a solution, both of which are needed to calculate pressure using the ideal gas law, PV=nRT. Osmotic pressure is similar but we substitute the number of moles of the solution and the volume by using the molarity, you cannot do this with molality, since it is dependent on mass, not volume.
What can happen to animal cells when placed in a hypotonic solution explain?
What can happen to animal cells when placed in a hypotonic solution explain
Could you please explain on a particle basis how the addition of a solute affects the boiling point and the freezing point and the vapor pressure of the solvent?
A solute adds particles to a solution, such as: NaCl-> Na+ + Cl- This puts 2 particles in the solution for every 1 formula unit of table salt. Any particle that gets added to a liquid interferes with the liquids ability to form crystals (ice), it interferes with the liquids ability to break surface tension ( boiling), and since less liquid molecules can escape there is less vapor pressure. Addition of a solute means: To freeze the solution you would have to slow the molecules down more than normal to encourage crystal growth, so the temp must be lowered. To boil the solution you would have to speed the molecules up more than normal to encourage the molecules to leave the liquid, so the temp must be increased. To increase the vapor pressure of the solvent has the same explanation as boiling.
Explain why the boiling point and the melting point can be used to help identify substances-?
It's because substances have different boiling point and freezing point. By finding the exact boiling point and freezing point, you can identify a substance. Keep in mind that a material's melting point is the same as its freezing point. These are just different terms for the same thing, it just depends on whether energy is being removed from a substance (freezing) or if energy is being added to a substance (melting). The same thing also applies to the boiling/condensation point.
In the compare-and-contrast essay what does compare mean?
Explain the similarities between two or more objects.
Is the freezingbof mercury a reversible or irreversible physical change Explain your answer?
Freezing mercury is a physical change. It can be reversed by raising the temperature above the freezing point.
Compare cultural and structural theories which attempt to explain the social patterning of health and illness?
compare cultural and structural theories which attempts to explain the social patterning of health and illness
A cook decided to add salt to a pot of soup that was boiling on the stove. As soon as the salt was added the soup stopped boiling. Explain why this happened?
Adding the salt to the soup raised the boiling point of the water in the soup. This is a well known phenomena in thermodynamics that when you add a solute (especially one with a much higher boiling point than the solvent) to a solvent (which is water in this case) you will initially increase the temperature at which the resulting solution will boil - and incidentally also depress the temperature at which it will freeze.
