Recent Post

How mirror can be identified by observing the values of the magnification?

How mirror can be identified by observing the values of the magnification? If an object is placed within the focal length of a mirror, the image of the object will get magnified in case of a concave mirror, and will get diminished in case of a convex mirror. The value of magnification will be greater than 1 in case of a concave mirror, and less than 1 in case of a convex mirror.

Liquids which are miscible

Liquids which are miscible

If miscible liquids are to be separated, then this can be done by fractional distillation. The apparatus used for this process is shown in the photo and diagram in Figure, and could be used to separate a mixture of ethanol and water. 

Fractional distillation relies upon the liquids having different boiling points. When ethanol and the water mixture is heated the vapours of ethanol and water boil off at different temperatures and can be condensed and collected separately. 

Ethanol boils at 78 °C whereas water boils at 100 °C. When the mixture is heated the vapour produced is mainly ethanol with some steam. Because water has a higher boiling point of the two, it condenses out from the mixture with ethanol. This is what takes place in the fractionating column.

The water condenses and drips back into the flask while the ethanol vapour moves up the column and into the condenser, where it condenses into liquid ethanol and is collected in the receiving flask as the distillate. When all the ethanol has distilled over, the temperature reading on the thermometer rises


steadily to 100 °C, showing that the steam is now entering the condenser. At this point, the receiver can be changed and the condensing water can now be collected.

Fractional distillation is used to separate miscible liquids such as those in crude oil, and the technique can also separate individual gases, such as nitrogen, from the mixture we call air.



You may also read



Popular Posts

What is the series connection of resistors?

The Importance of Information and Communication Technology

What is biological coin?

Why motha grass is called C4 plant?

What is Buoyancy?

When you open the gas cylinder used for cooking, which action takes place first diffusion or effusion?

What is management?

States of Matter