Name 6 methods of seperating materials?

Answer 1

The methods are:- * handpicking * threshing* winnowing * sieving * sedientation, decantation and filteration * evaporation

Answer 2

1. Centrifuge separates depending on density eg solid from solvent or blood cells according to size
2. Distillation separates a liquid from a solution or two liquids eg alcohol from liquid
3. Evaporation of a solvent from a solute eg salt is left behind when drying
4. Filtration will separate a solid from a liquid or a solid from a gas eg air strained through filter paper
5. Gas chromatography will separate gaseous mixtures; paper chromatography will separate solutes from their solvents
6. An anhydrous solid can absorb water from an mixture of water and some other chemical
7. Two solids can be separated depending on solubility in a solvent
8. Two gases can be separated depending on reactivity ie react one gas and not the other - oxygen is used up in combustion but nitrogen will remain in the reacting vessel

Answer 3

Filtration: works best for solids suspended in a liquid (to separate sandy water into dry sand and pure water for example) or for two solids with very different particle sizes (to separate a mixture of sand and gravel).

Distillation: works to separate liquids that have different boiling points. This method is used to separate alcohol from water (to make hard liquor) and the essentially the same method is used to take oil from the ground and turn it into petroleum products such as gasoline.

Chromatography: used to separate mixtures of liquids based on polarity. Many different types exist, including thin layer chromatography (TLC), gas chromatography (GC), and column chromatography.

Extraction: used to separate a mixture of solids based on their solubilities in organic and inorganic phases. Differences in pH can also be used to separate different solids by selectively ionizing one compound, causing it to dissolve more readily in inorganic solution.

Answer 4

Decantation, filtration, sedimentation, extraction, sublimation, and distilation

Answer 5

Some scientific methods you can use are:asking questions, form hypothosis.

Answer 6

flotation, filtration, distillation evaporation, recrystallization, and chromotography