She did her best to keep all the variables the same such as setting her water in a room with the same temperature for all three containers filled with water, the same air flow for all there, and the water was in the exact same containers. Thanks so much, Amber. Re: Water evaporation rate with salt, fresh, and distilled w Post by SandbaggerOne » Thu Feb 26, am I'm going to link to an old response to a similar question because it was explained very well there: viewtopic.
Jump to. Board index. All rights reserved. Salts present in seawater lower its vapor pressure due to which the rate of evaporation decreases. Only the pure water molecules of seawater evaporate in the form of vapors leaving behind minute loads of salt as residue.
The air blowing around the sea contains salt particles that can be analyzed by checking the rusting of automobiles of nearby residents. It is important to understand that the salinity of pool water lowers the rate of evaporation. The salt particles lower the vapor pressure of saltwater in the pool and also occupy space at the surface of saltwater air-liquid boundary. Therefore, a lesser number of molecules of H2O are present on the surface and therefore lesser molecules of H2O can escape out in the form of vapors because some space on the surface is covered by the salt particles.
Therefore, saltwater pools evaporate slower than the freshwater pool. The salinity of the water always decreases the rate of evaporation. November 9, November 9, November 8, November 7, Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.
Skip to content Water is one of the essential items for the life of living beings. Salt Water Experiment During the practicals in high schools, we perform the experiment of salt crystallization in the chemistry laboratory.
Take a pan of water and pour some amount of salt into it such that the salt dissolves completely in the water. Place the black paper on the baking sheet. If the slowest part of the process is for heat to leak into the water from outside, then the saltwater could evaporate faster than the ice. If the slowest part is for the water molecules to diffuse away in the air, then the ice will evaporate faster because it still has a higher vapor pressure. I did this experiment several times but saltwater evaporated faster can you please explain why?
We've heard this several times. The best explanation we know of is as follows. As the saltwater starts to evaporate, it leaves a salty layer on the sides of the glass. This means that when seawater evaporates, only pure water returns to the atmosphere and the salt is left behind. This is how the oceans play such an important role in replenishing the freshwater drinking supply on Earth.
You can see this process for yourself by conducting a simple experiment. Take a piece of black construction paper and pour the remaining saltwater mixture onto the piece of paper you may want to add a few more teaspoons of salt to the water mixture to make it extra salty.
Let the paper sit in the sun for a few hours until the paper is dry. Experiment Overview: When a liquid is placed in a cup, it slowly escapes in a gaseous state until eventually, the container is empty. Before beginning, think about the following questions and write down your predictions: Do you think the liquids will evaporate at the same rate or different rates?
If you said the liquids will evaporate at different rates, which liquid do you think will evaporate the fastest? Which liquid will evaporate the slowest? Experiment Materials:.
Experiment Process:. Step 1 Create a saltwater mixture by combining 1 cup of pure water with 1. Step 2 Assemble four clear plastic cups of equal size in a row.
Step 3 Create a scale on the side of your cups. Step 4 Fill each cup with a different liquid pure water, saltwater, rubbing alcohol and orange juice. Step 5 Make a data chart to keep track of the level inches of each liquid on a daily basis. Step 6 Place the cups on a windowsill and record the starting height for each liquid as 3 inches.
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