it depends on if the solid is also water. if they are both water then its a physical reaction because it just changes the state of matter. if the solid isn't water then its chemical because the two substances then transform into one new substance.
Usually, no. If you dissolve an ionic compound (such as table salt) and the ions dissociate, a chemical reaction has occurred since actual bonds are broken, but if no bonds are broken or made (as happens with many random things you could toss into water), no chemical reaction has occurred.
(One could argue that even ionic compounds like table salt dissolving is not a chemical reaction since you can usually get the same substance back if the water evaporates, but since, for instance, Na+ and Cl- ions have different properties than table salt (one of which being that salt crystals are never part of enzymes and chloride ions sometimes are), it's just as reasonable to portray salt dissolving as a reversible chemical reaction: NaCl ↔ Na+ + Cl-.)
Dissolving a solute in a solvent is considered a physical change, not a chemical change. The main reason for this is that one can recover the solute if one evaporates the solvent, so that means a chemical change has not taken place. If a chemical change takes place, then you cannot recover the original substance in its original form.
Another view. I agree that this is a physical change, but the reason is not reversibility. Many chemical reactions are easy to reverse. Many physical ones are hard to reverse. The only reliable criterion is whether a new substance is formed. There is no new substance in dissolving.
Generally it is a physical change because you still have the same substance. Sugar remains the same molecule when dissolved in water. Fat remains the same when dissolved in oil.
When a molecule of salt dissolves in water it is usually a physical change because if you just evaporate the water you get molecules of the same salt back.
There are cases where the process of dissolving actually includes an element of chemical reaction that causes some molecules to react and allow more of the solute to dissolve. In this case the dissolving is still a physical change, but it is paired with a chemical change to produce the net dissolving effect.
No. Abundantly no.
dissolving is a physical process, it does not modifies the chemical structure of substances
If the solid reacts with the Oxygen or Hydrogen in the water it will be a chemical change. If not, it will be a physical change.
No. When a solute dissolves, it simply mixes with the solvent. No new substance is formed so there is no chemical change. Dissolving is considered a physical change.
Disintegration can be a chemical change, but it depends on what kind it is. For example, sharpening a knife is a physical change, but burning a piece of wood is a chemical change.
All physical changes are reversible because the molecules do not undergo change in any chemical reaction even in in the change in the state of matter. NaCl is a salt compound and each molecules gets easily dissolved in water and the salt recovered by evaporation of water.
It is both:It is a physical property because the solid salt becomes part of the liquid state of the water.It is a chemical property because the act of dissolving in water changes the salt (NaCl) into separate ions.
physical: it's a change of state, it does not change the chemical makeup: molecular, atomic
If a solid is crushed to a powder, it is a 'Physical' change. This is because the chemical compounds in the solid isn't changing, just the texture and shape of it.
is dissolving a chemical or physical changeWell, it is not. Because you are not changing the chemical identity of the solid. It's still solid chemically and water chemically.
The process of dissolving is a physical change. This is because the process can be simply reversed. With a chemical change a new substance is formed and the process can not be simply reversed.
Dissolving in water is a physical change.
physical change- solid to solution
Disintegration can be a chemical change, but it depends on what kind it is. For example, sharpening a knife is a physical change, but burning a piece of wood is a chemical change.
You can evaporate the water and recover the sugar unchanged. A chemical change means a chemical reaction has taken place and changed the substance chemically. A physical change means that a solid has become a liquid such as dissolving sugar.
chemical it never changes from liquid to gas or solid you know what i mean
All physical changes are reversible because the molecules do not undergo change in any chemical reaction even in in the change in the state of matter. NaCl is a salt compound and each molecules gets easily dissolved in water and the salt recovered by evaporation of water.
this is a chemical change cause you can't return it back to solid salt
yes dissolving sugar in a coffee is a physical change in a chemical change a new substance will be formed, and the component of this substance will be different from the parent substance. but in the case of sugar dissolving in coffee, mixture of sugar and coffee retain their respective properties. Moreover we can also separate the constituents from that mixture.and there is no new substance is formed
No, it is simply the water dissolving the sodium acetate, which is a physical change. There is a physical change when you introduce a seed crystal to the sodium acetate as the bonds in the chemical become different to form a solid. By adding water, you are just dissolving it and then allowing it to become supersaturated through heating.
Physical (not chemical) changesNaCl(s) → Na+(aq) + Cl-(aq)Added:These are NOT chemical changes. In solid NaCl there are already Na+ and Cl- ions present in the (fully ionic)crystallic matrix. These ions are only separated by the water molecules. This is exactly what is called: 'dissolving'