Dissolving is a process where solvent moleculessurround other molecules, which causes thesolid to become uniformly dispersed in a solution.In your example, salt ions in a solid are slowlysurrounded by water molecules. This happensthrough the collision of molecules, where solventmolecules collide with salt ions in the solid,and slowly eat away at the block of solid.
If you increase the temperature, moleculesvibrate more quickly, so you would expect thesecollisions would happen more quickly, and anydissolution would also happen more quickly. Also,depending how you are heating your solution,you may also establish convection currents in yoursolution, which would also speed up dissolution.
All other things being equal, you wouldnormally expect a hotter solution to dissolvethings more quickly. However, this doesn'ttell you about how much can be dissolved, whichwill depend on the material. Some things, likesugar, or sodium chloride (table salt) are moresoluble at higher temperature. This means youcan put more salt or sugar in water when thetemperature is high, but not all things behavein this way!
The best way to answer this is to try ityourself!
Take 3 glasses of water. Add cold water to one(either ice water, or water from the fridge), addroom temperature water to the second, and add hotwater to the third. Then, add 1 teaspoon ofsalt to each glass at the same time, andtime how long it takes each to dissolve.
I think you will find out that the saltdissolves quickly in the hot water, more slowlyin the room temperature water, and slowest in thecold water. In fact, the salt might never evenfully dissolve in the cold water!
It out that this trend is true for dissolvingpretty much anything into water– salt, sugar,baking soda, etc. The hotter the water, thefaster you can dissolve something in it.
The kind of salt we eat dissolve more quicklyin room temperature water than in cold water.That is because at room temperature, the tinyparticles that make up the water and salt movearound and vibrate at higher speeds. This mixesthe salt and water faster and makes the saltdissolve faster. In general, mixing makesthings dissolve faster, and that's why we stir ourtea or coffee when we add sugar and cream.
That's an experiment you can do:
Put a half teaspoon of salt in cold water and ahalf teaspoon of salt in room temperature water in2 glasses with the same amount of water, and stirone of them with each hand. Does the saltdissolve faster in 1 glass? Does all the saltdissolve, in both glasses?
Salts are usually more soluble in hotterwater - that means that more salt willdissolve in hotter water, but that doesn't answeryour question about whether the salt will dissolveFASTER. Maybe I'll do the experiment!
Ordinary table salt- sodium chloride - isunusual, because the amount of salt that dissolvesin colder and hotter water is almost the same. I'm surprised, and I just found a scientificarticle that tells about this. I'm going to readit now! Thank you for your question!
Salts dissolve quicker in hot water compared tocold water (of course, assuming the sameamount of enough water to dissolve salts). Thereason is indicated in the temperature itself.
High temperature means higher averagevelocity of water molecules, thus higherkinematic energies to break the bonds of salts (dissolving salts). Another reason is thehigher chance for hotter water molecules tointeract with salts, and it is another reasonthat salts dissolve quicker in hot water. Inshort, the reasons are: higher velocities,higher energies and more frequent interactions.
Best,Salt dissolves better in warmer water thanin colder water. This is because the watermolecules are moving faster and can keep the saltions from joining together by pulling on them.
Yes, salt and other ionic compounds like itwill dissolve faster the hotter the water it isdissolved in. This is because hottemperatures make atoms move quicker and thequicker they move, the easier they come apart! Youcan try this experiment at home if you want!
Yes! Salt does dissolve quicker in roomtemperature water than in cold water. In fact, youcan take that even further, and say that any solidsubstance that can dissolve in water, willdissolve quicker in hot water than roomtemperature water. Every substance (sugar,salt, baking soda) will dissolve differently inwater, and each one will have a different maximumweight that can dissolve in a given amount ofwater. When you hit the maximum amount that willdissolve, you say the mixture is a saturatedsolution at room temperature. For everytemperature of water, there is a different maximumamount (generally more) of substance that willdissolve.
You can also look up what a "super-saturatedsolution" is, and see how getting water superhot can cooling it down actually change thismaximum amount that can be dissolved at roomtemperature.
You are correct, salt dissolves quicker inroom temperature than in cold water. Salt ismade of two atoms (sodium and chlorine). Saltdissolves because water molecules separate thesetwo atoms. Higher temperatures mean theparticles move faster, making the separationquicker.
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