How chromatography works simple explanation?
Chromatography works by passing the dissolved material, liquid or gas through a filter material. The molecules separate into layers as the molecules pass through the filter. The mechanism of separation depends on the filtering method, which is determined by the kinds of molecules to be separated.
What is chromatography used for BBC Bitesize?
Separating dissolved solids – chromatography Paper chromatography is a method for separating dissolved substances from one another. It is often used when the dissolved substances are coloured, such as inks, food colourings and plant dyes.
How does chromatography work step by step?
Chromatography is a method of separating mixtures by using a moving solvent on filter paper. A drop of mixture solution is spotted near one end of the paper and then dried. The end of the paper, nearest the spot, is then dipped into the solvent without submerging the spot itself.
What is chromatography ks3?
Chromatography is a separation technique used to separate mixtures of soluble substances. These are often coloured substances such as food colourings, inks, dyes or plant pigments. Chromatograms can be used to match known pigments with those in a mixture.
Why do things separate in chromatography?
The different components of the mixture travel through the stationary phase at different speeds, causing them to separate from one another. The nature of the specific mobile and stationary phases determines which substances travel more quickly or slowly, and is how they are separated.
How does distillation work BBC Bitesize?
Distillation is a separation technique used to separate liquid (the solvent) from a mixture and keep the liquid part. Distillation involves boiling the solution and then condensing the vapour back into a liquid by cooling it down. For example, dirty water can be distilled to produce pure water, which is safe to drink.
Why do pigments separate in chromatography?
Pigments are separated according to differences in their relative solubilities. In order to extract these pigments from the thylakoid membranes of the chloroplasts, the organelles in which photosynthesis occurs, fresh, ground or torn leaves (preferably spinach) may be soaked in acetone or concentrated alcohol.
What is chromatography ks2?
Chromatography is used as a means of separating mixtures. The word itself means ‘colour writing’. Chromatography can separate colours in order to see what colours make up that specific colour.
How do you explain chromatography to a child?
Chromatography is a method using mixed substances that depends on the speed at which they move through special media, or chemical substances. It consists of a stationary phase (a solid) and a mobile phase (a liquid or a gas).