Chemistry, asked by geniusking34, 5 months ago

Which of the following is true about distillation boiling point determination? More than one answer may be correct.
1.Keep boiling the sample until there is nothing left in the flask.
2.The reduced pressure needs to be recorded if performing the distillation under vacuum.
3.Impurities in the sample will not affect the boiling point.
4.The sample should be as pure as possible before boiling point determination.
5.The thermometer should be positioned with the tip immersed in the liquid.​

Answers

Answered by satwikBera
0

Answer:

1 true

5 true

I hope it will help you

Answered by dsubhaa2010
0

Answer:

Statement 2, 4 and 5 are correct.

Explanation:

What is distillation?

  • In the distillation process, a liquid is heated until it boils, and then the hot vapours that follow from that process are condensed and collected. For thousands of years, people have used the principles of distillation. Ancient Arab chemists presumably utilised distillation for the first time to separate scents. Diqarus, or distillate-collecting vessels, are said to have existed as early as 3500 BC.
  • Distillation is an effective method for both the identification and purification of organic molecules in the modern organic chemistry lab. One of the physical characteristics used to distinguish a chemical is its boiling point. A chemical is purified through distillation by being separated from a non-volatile or less-volatile substance.

Distillation boiling point determination:

  • The temperature at which a liquid's vapour pressure reaches equilibrium with atmospheric pressure is known as the liquid's boiling point. In order to accomplish distillation at reduced pressure, it is required to record the external pressure.
  • The sample ought to be as pure as is practical. When contaminants are dissolved, the liquid's boiling point rises. Consequently, the recorded boiling point won't be exact.
  • To measure temperature changes properly, the thermometer's tip must be placed in the liquid.

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