0
Why does vapor pressure of a saline-solution lower than a pure solvent?
Wiki User
∙ 10y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
A reduction of vapor pressure occurs with the addition of a nonvolatile solute to a solvent because?
There are fewer solvent molecules at the surface that can evaporate.
Dissolving solutes into a solution will?
lower vapor pressure
Select all situations for which housekeeping measures apply for Air Qualitily NESHAP Compiance?
1) When a solvent is used with a vapor pressure less that 7mm that contains HAPs 2) When a solvent is used that has a flash point less than 200 Degrees Fahrenheit 3) When a solvent is used with a vapor pressure greater than 7mm of Hg
How can you create a more concentrated solution?
You'll need to remove solvent somehow; most likely by evaporation if the solvent has a higher vapor pressure than the solute.
Do impurities in water affect evaporation rate?
Yes. They will lower the vapor pressure of water.
What statements is true about vapor pressure?
The vapor pressure of 1 m sucrose (C12H22O11) is higher than the vapor pressure of 1 m NaCl where the solvent is water Sea water has a lower vapor pressure than distilled water. The vapor pressure of 0.5 m NaNO3 is the same as the vapor pressure of 0.5 m KBr, assuming that the solvent in each case is water The vapor pressure of 0.10 m KCl is the same as the vapor pressure of 0.05 m AlCl3 assuming the solvent in each case is water The vapor pressure of 1 m NaCl is lower than the vapor pressure of 0.5 m KNO3, assuming that the solvent in each case is water The vapor pressure of 0.10 m NaCl is lower than the vapor pressure of 0.05 m MgCl2 assuming the solvent in each case is water.
The vapor pressure of 1 m NaCl is lower than the vapor pressure of 0.5 m KNO3 assuming that the solvent in each case is water?
True
The difference between vapor pressure of a pure solvent and its partial pressure?
vapor pressure of a pure solvent is the pressure needed for the gas to escape the pure solvent in vapor form. its partial pressure in this case will be the pressure of that escaped vapour (in the mixture of air). in simpler terms vapor pressure describes a single condensable system (just the vapor of the solvent and the liquid state of the solvent) while its partial pressure describes the multicomponent system (air). they are essentially the same thing describing different systems
What will adding solute to pure solvents cause?
Adding a solute to a pure solvent will lower the freezing point, elevate the boiling point, and lower the vapor pressure.
The solute molecules mixed with the solvent molecules in a solution cause the of a solution to be higher than it is for an equal volume of pure solvent?
Raoult's Law and Vapor Pressure LoweringWhen a nonvolatile solute is added to a liquid to form a solution, the vapor pressure above that solution decreases. To understand why that might occur, let's analyze the vaporization process of the pure solvent then do the same for a solution. Liquid molecules at the surface of a liquid can escape to the gas phase when they have a sufficient amount of energy to break free of the liquid's intermolecular forces. That vaporization process is reversible. Gaseous molecules coming into contact with the surface of a liquid can be trapped by intermolecular forces in the liquid. Eventually the rate of escape will equal the rate of capture to establish a constant, equilibrium vapor pressure above the pure liquid.If we add a nonvolatile solute to that liquid, the amount of surface area available for the escaping solvent molecules is reduced because some of that area is occupied by solute particles. Therefore, the solvent molecules will have a lower probability to escape the solution than the pure solvent. That fact is reflected in the lower vapor pressure for a solution relative to the pure solvent. That statement is only true if the solvent is nonvolatile. If the solute has its own vapor pressure, then the vapor pressure of the solution may be greater than the vapor pressure of the solvent.Note that we did not need to identify the nature of the solvent or the solute (except for its lack of volatility) to derive that the vapor pressure should be lower for a solution relative to the pure solvent. That is what makes vapor pressure lowering a colligative property--it only depends on the number of dissolved solute particles.summarizes our discussion so far. On the surface of the pure solvent (shown on the left) there are more solvent molecules at the surface than in the right-hand solution flask. Therefore, it is more likely that solvent molecules escape into the gas phase on the left than on the right. Therefore, the solution should have a lower vapor pressure than the pure solvent.Figure %: The Vapor Pressure of a Solution is Lower than that of the Pure Solvent
A pure solvent has a vapor pressure the vapor pressure of a solution A.EQUALTO B.LOWER THAN C.higher than?
A solution has a higher vapor pressure than a pure solvent. This is why salt water boils faster than pure water.
Why is vapor pressure of solution of glucose in water lower than that of water?
vapour pressure of a solution containing non volatile solute if a non volatile solute is added to volatile solvent the vapour pressure of the solution is lower than the vapour pressure of pure component glucose is non volatile and water is volatile The surface of a pure solvent is populated only by solvent molecules therefore its easier for them to escape . but when glucose is present only solvent molecules volatile They alone can escape to build up the vapor pressure of the solution by Vijay Iyer
How does the addition of solute affect freezing and boiling point and vapor pressure on a solvent?
A non-volatile solute affects increases osmotic pressure. This is a colligative property. There will be a higher osmotic pressure required to prevent the solvent from flowing into the solution because the solvent has a higher chemical potential without solute in it.
Why is it when a solute is added to a pure liquid the boiling point increases and the freezing point decreases?
Boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. The vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid. At the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.
Why the liquid boils when its vapor pressure becomes equal to ATM pressure?
all solvent has vapour pressure properties is there when the vapor pressure is equal to atmosphere at that patricular temperature is boiling point
True or false The vapor pressure of 1 m sucrose is higher than the vapor pressure of 1 m NaCl where the solvent is water?
maybe
A reduction of vapor pressure occurs with the addition of a nonvolatile solute to a solvent because?
There are fewer solvent molecules at the surface that can evaporate.
