Dyes in black ink can be separated by :
Chromatography is a technique used to separate mixtures based on the differential distribution of components between a stationary phase and a mobile phase. For separating dyes in ink, paper chromatography is a common method. The paper acts as the stationary phase, and a solvent (like water or alcohol) acts as the mobile phase. As the solvent moves up the paper by capillary action, it carries the different dyes with it. Dyes that are more soluble in the solvent and have weaker interactions with the paper move faster and further up the paper, resulting in their separation into distinct spots at different heights.
Let’s consider the other options:
A) Evaporation separates a soluble solid from a liquid solvent by heating the solution to evaporate the solvent. This would only leave the mixture of dyes behind, not separate them.
B) Centrifugation separates components of a mixture based on their density by spinning at high speed. It is used for separating solids from liquids or liquids of different densities (e.g., separating cream from milk, separating blood cells from plasma). It is not suitable for separating dissolved dyes.
C) Sublimation is the process where a substance changes directly from a solid to a gas state upon heating (e.g., dry ice, iodine). It is used to separate sublimable solids from non-sublimable ones. Dyes in ink are not typically sublimable.
– Chromatography is a separation technique used to separate components of a mixture based on their different affinities for a stationary phase and a mobile phase.
– Paper chromatography is specifically effective for separating different dyes in ink.