PDF chapter test TRY NOW
Answer the following questions:
1. To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
Mass of common salt = 36 g.
Mass of water = 100 g.
Concentration of solution = [( / ) x 100]
Concentration of solution = [(36g / (100+36)g) x 100] = %.
Mass of water = 100 g.
Concentration of solution = [( / ) x 100]
Concentration of solution = [(36g / (100+36)g) x 100] = %.
2. How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25 ºC), which are miscible with each other?
The separation can be done by applying a method of . Both are miscible liquids. Since the difference in the boiling points is less than 25K, the separation can be done with the help of the process. Petrol with less boiling point distils first, leaving behind kerosene in the distillation from the flask.
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