Any chemical reactions - a physical phenomenon.
Dissolving sodium carbonate in water is a physical change, not a chemical change. This is because the chemical composition of sodium carbonate remains the same before and after dissolving.
No, dissolving powder into water is a physical change, not a chemical change. The powder molecules are still the same chemical compounds as they were before dissolving, just dispersed in the water molecules.
Dissolving NaCl in water is a physical change, not a chemical change. The NaCl molecules remain the same chemically, but the arrangement of the particles changes as they interact with water molecules.
This is a physical change. You can separate the salt and water by the physical process of distillation or evaporation where the water is boiled away and the salt is left behind.
It's a physical change. No NEW substances are created. And if you evaporate water, you're back to square one (can be separated). Also, there is no change in color, no precipitate, no odor and no gas released.
Dissolving in water is a physical change.
It is a physical change.
Dissolving in water is a physical change because it only involves the separation of molecules within a substance without changing their chemical composition.
Dissolving in water is a physical change.
It is a physical change.
Dissolving sodium carbonate in water is a physical change, not a chemical change. This is because the chemical composition of sodium carbonate remains the same before and after dissolving.
Dissolving is a physical process.
Dissolving sugar in hot water is a chemical change.
Dissolving in water is a physical change.
Dissolving in water is a physical change.
Dissolving in water is a physical change.
Dissolving is a physical change.