Chemical
physical
Only if the mixture is a physical, not chemical, change.
No, it is a chemical change. A chemical reaction occurs when the two are mixed-- bubbling/fizzing.
If something changes color when mixed with water, it is typically a physical property. It could be due to interactions between the substance and water molecules, but the chemical composition of the substance remains the same.
It is a physical change. The sodium hydroxide dissolves, but it is still sodium hydroxide.
Physical
Adding antifreeze to your radiator is a physical change because the antifreeze retains its chemical composition and properties when mixed with the water in the radiator. It does not undergo a chemical reaction to form a new substance.
It is a physical change because the oil and the water do not change in chemical composition.
When copper sulfate salt is mixed with water, it undergoes a physical change. The salt dissolves in the water, resulting in a homogeneous solution, but the chemical composition of the copper sulfate remains unchanged. This process is reversible, as the water can be evaporated to retrieve the original salt.
Oil and water do not mix because they have different polarities. When oil and water are mixed, they separate into distinct layers due to their different densities. This separation is a physical change where the molecules of each substance retain their original properties.
The change of color when a substance is mixed with water is a physical property because it does not alter the chemical composition of the substances involved. It is merely a change in appearance due to the interaction of light with the new mixture. This change can be reversed by separating the substances.
Boiling water is a physical change because it does not change the chemical composition of the water.