B. Name the separation method for the following: 1. Salt from sea water 2. Oil from water 3. Tea leaves from tea 4. Cream from milk 5. Wheat grains from husk
Answer (1)
In Chemistry, separating mixtures into their individual components is an important concept. Here is a detailed explanation for the separation methods required for the given scenarios:
Salt from Sea Water :
The separation method used is evaporation .
Why : Evaporation is used because when sea water is heated, the water turns into vapor and leaves the salt behind.
How : The process involves heating the sea water until it boils and the water evaporates, leaving the solid salt crystals.
Oil from Water :
The separation method used is decantation or using a separating funnel .
Why : Oil is less dense than water and does not mix, forming a separate layer.
How : In decantation, the oil layer is carefully poured off. Using a separating funnel, the water is drained from the bottom, leaving the oil.
Tea Leaves from Tea :
The separation method used is filtration .
Why : Filtration is used because it allows the liquid tea to pass through while the tea leaves are retained on the filter.
How : A filter paper or a sieve is used as the filter medium to separate the tea leaves from the liquid.
Cream from Milk :
The separation method used is centrifugation .
Why : Cream is lighter than milk and can be separated by spinning the milk, allowing the cream to rise and be removed.
How : In a centrifuge, the milk is spun at high speeds, causing the heavier milk to separate from the lighter cream, which can then be skimmed off.
Wheat Grains from Husk :
The separation method used is winnowing .
Why : Wheat grains are heavier than husk and can be separated by allowing the wind to blow away the lighter husks.
How : The mixture is poured from a height, allowing the wind to carry away the husk while the heavier grains fall straight down.
