That depends on what the substances are and how they are combined or mixed. Something like ethano and water can be separated by distillation, the process taking only a few minutes, but something like a mixture of uranium-235 hexafluoride and uranium-238 hexafluoride must be split by centrifuge, the process takinf weeks to separate a small amount. Other ways of separating a mixture include melting (if it is a solid) and using density properties; dissolution, decanting and evaporation (where one or more substances are soluble in the given solute and others are not); recrystallisation (normally to remove impurities).
Physical change does not produce a new substance. Chemical change produces a new substanceIn a chemical change the atoms/molecules are chemically joined together so they are very hard to separate. were as they are easyer to separate in a physical change
No, it's a physical change because you can still separate the two from each other.
Adding salt to water is not a chemical reaction, nor is it a chemical change. When salt dissolves in water, this is an example of a physical change. Although the sodium and chlorine ions separate in the water, no chemical reaction takes place.
physical, because you can technically separate the milk and eggs again.
It is a physical change as an alloy is a solid solution made from various metals. As you can still separate these different metals after the alloy is made it is a physical change and not a chemical change.
Physical change does not produce a new substance. Chemical change produces a new substanceIn a chemical change the atoms/molecules are chemically joined together so they are very hard to separate. were as they are easyer to separate in a physical change
when you separate a substance from a mixture, it's a physical change... Technically, you can get it back in the mixture.
No. It is a physical change. All you have to do to separate the two is to evaporate the water. There is no chemical change.
No, it's a physical change because you can still separate the two from each other.
No. It is a physical change. All you have to do to separate the two is to evaporate the water. There is no chemical change.
both
It depends ont eh chemical change, because in some changes not all the components of the mixture are used.
A physical change, and a chemical change.
chemical .... :0)
Physical change is preferable because it is easier than chemical method.
no it is a chemical change
Yes, using electricity to separate water into hydrogen and oxygen is a chemical change because it involves breaking the bonds between the hydrogen and oxygen atoms in water molecules to form separate hydrogen and oxygen molecules. This process is known as electrolysis.