hot water
It dissolves in both cold and warm.
Yes. The temperature of the water helps dissolve the salt.
Yes. The temperature of the water helps dissolve the salt.
Hot water. Hot water can also dissolve slightly more sugar than cold water can.
Even in cold water sugar will dissolve eventually, but it does dissolve faster in hot water. Hot water molecules move faster than cold water molecules and therefore can more easily break sugar molecules out of solid sugar and into solution.
Salt is more soluble than baking soda in water. Salt is able to dissolve in water completely, while baking soda may leave some residue behind.
Most solutes dissolve better in warm water because the molecules of warm water move faster, so the water molecules and the solute come in contact more often. For solid solutes, it is generally true that you can dissolve more in warm water than cold water (though I'm not sure the above answer states the reason for this correctly). But gasses generally dissolve better in cold water.
Yes, sugar can dissolve in a clear glass of cold water without stirring, but it will dissolve more slowly compared to if the water were warm. The process can be accelerated by stirring or heating the water.
It is more soluble in warm water.
The molecules are slower and more compact.
Salt will dissolve faster in hot water compared to cold water. This is because the heat in the hot water speeds up the movement of the water molecules, allowing them to interact more readily with the salt particles and dissolve them quicker.
Hot water will make sugar dissolve faster compared to cold water because the increased temperature causes the sugar molecules to move more rapidly and interact with the water molecules more effectively.