A pure substance is obtained using different and complicate methods of chemistry: distillation, filtration, ion exchangers, crystallization, precipitation etc.
distillation
To obtain pure thorium metal it is necessary to separate thorium from other elements.
To separate rock salt into salt crystals and pure dry sand, first dissolve the rock salt in water, creating a saltwater solution. Next, filter the mixture to separate the sand, which will remain on the filter paper, from the saltwater solution. Finally, evaporate the water from the saltwater solution to obtain pure salt crystals, leaving behind the dry sand collected from the filtration process.
The best separation technique to separate pure water from muddy water is filtration. In this process, the muddy water is passed through a filter, which allows the liquid (pure water) to pass while retaining the solid particles (mud and debris) on the filter paper. This method effectively separates the two components based on particle size.
it is important to separate and purify substances so that: 1.we can get them in their pure form. 2.to remove undesirable particles from them.
to pure them
distillation
by distillation
Sulphur is a pure element. Unless its mixed in with something else there is nothing to separate it from.
There are many substances.Some of them are ribosomes,enzymes,grana,starch granules,DNA etc
A saline solution is a homogeneous mixture because its appearance and composition are uniform throughout the solution. A substance is salt. A saline solution is a combination of the two substances water and salt. However, in the salt-water solution, the salt is completely dissolved in the water.
Impossible to find pure polonium; it is necessary to separate polonium from other radioisotopes.
ask a friend
To obtain pure thorium metal it is necessary to separate thorium from other elements.
Filtering
A method is repeated processes of crystallization/recrystallization, for a supplementary refining.But it is a nonsense in your question: salt or pure salt are both sodium chloride, supposed to be pure.
Pure maple syrup doesn't contain salt.