It is a physical change because only the phase of the salt actually changes - the two compounds do not react. The salt dissolves in the water, but if the water evaporates, the salt is left behind in its solid state.
This is a physical process.
The process of adding dish soap to water in a sink is a physical change.
Adding water (which is not a reactant) is a physical process.
Adding hot water to pot noodle is a physical change because the chemical nature of water remain unchanged.
Making water glow is a physical change. Adding a substance like a fluorescent dye or phosphorescent material to water to make it glow involves only a physical alteration in the properties of water, not a chemical change in its molecular structure.
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.
The humidifier putting moisture into the air is a physical change. It involves adding water vapor, which is a change in the physical state of water from liquid to gas, without altering the chemical composition of the water molecule.
Physical because, the lemonade dissolves into the water, without creating any of the chemical changing results.
No, adding dish soap to water in a sink is not considered a chemical change. It is a physical change because the substances involved do not undergo a chemical reaction to form new substances.
When silver nitrate is added to water, it undergoes a physical change as it dissolves in the water. No new substances are formed during this process, so it is considered a physical change rather than a chemical change.
Adding cornflour to water is a physical change. The reason this process is classified as such is that it does not change the chemical identities of the substances involved, which is the criterion for a process to be considered a chemical reaction. Technically, the cornflour would slowly hydrolyze in water, which would be a chemical reaction.
Adding sand and water is a physical change because no new substances are formed. The sand particles remain as they are and simply mix with the water, without any chemical bonds being broken or formed.