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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).
What else can I help you with?
Are physical and chemical change different?
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
Is separate sand from gravel chemical change?
No, it's a physical change because you can still separate the two from each other.
Is saltwater a chemical reaction?
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.
if you add eggs and milk and stir is that chemical or physical change?
physical, because you can technically separate the milk and eggs again.
Is converting iron to a steel alloy a physical change?
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.
Are physical and chemical change different?
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
Is separate is a physical or chemical change?
when you separate a substance from a mixture, it's a physical change... Technically, you can get it back in the mixture.
Is dissolving salt in water a example of a chemical change?
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.
Is separate sand from gravel chemical change?
No, it's a physical change because you can still separate the two from each other.
Is dissolved salt in ocean water an example of a chemical change?
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.
Does the method of distillate separate the physical or the chemical change of a substance?
both
Why will a chemical change not separate a mixture?
It depends ont eh chemical change, because in some changes not all the components of the mixture are used.
A collection of matter made of substances that stay separate and keep their properties is a?
A physical change, and a chemical change.
What change makes a substance which cant be separate by physical means?
chemical .... :0)
If you had a mixture of two substances and had your choice of using a physical change or a chemical change to separate them which would you prefer?
Physical change is preferable because it is easier than chemical method.
Is using oxygen to separate molten copper sulfide into copper sulfur dioxide a physical change?
no it is a chemical change
Is using electricity to separate water into hydrogen and oxygen 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.
