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Answered 2013-05-24 19:00:24

The presence of the impurities will cause the boiling points to rise (also the melting points to fall). When you add the impurities, the substance doesn't remain pure affecting the boiling point to increase because now, more energy is required to boil the liquid with impurities.

The melting points fall because impure substances require less energy to separate the particles.

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impurities lower the magnitude of melting point of as substance. And it increases the magnitude of boiling point.



Let's say substance A is the substance and substance B is the impurity. The boiling point of the mixture would be somewhere between that of A and B, depending on the amount of impurities in the mixture.


it indicates the impurities of a substance


The boiling point may increase or decrease if a substance contains impurities.


The boiling point of a substance depend on the pressure and the impurities contained.


Yes, impurities have important effects on the melting and boiling point of materials.


It is not true, the volatile impurities decrease the boiling point of a liquid.


Because a solution with impurities has a lower volatility. The mole fraction of the solvent is also decreased.


Knowing the boiling point of a substance provides information to determine what the substance is if its unknown. If you are making a substance, checking the boiling point will let you know if you have made what you set out to make, (because impurities can mess up the boiling point)


Altitude: higher you go, the lower the boiling point. At the top of Mount Everest, water boils at 67centigrade. Impurities: increase the boiling point. In science we say, the bp is elevated by impurities.


Anything that is dissolved in water will cause the boiling point to rise (and the freezing point to lower).


Add impurities (salt and others) to the substance.


The boiling point will increase. The impurities essentially "block" the molecules of the substance from leaving the liquid as a gas, so a higher temp is needed to boil it. see colligative properties.


The boiling point of water increases on adding impurities because the boiling point of the impurities also adds up to the boiling point of water thus increasing it.


No. Impurities increase the boiling point of a substance.


the presence of impurities decrease the melting or freezing point of water but the nonvolatile impurities increase the boiling point and volatile impurities decrease the boiling point of water


The stronger the IMF, the higher the boiling point and the lower the melting point. The weaker the IMF, the lower the boiling point and the higher the melting point.


Impurities in water lower the rate of evaporation because impurities increase the boiling point.



Dissolved particles (ions, molecueles) will make the melting point somewhat lower and the boiling point higher.


Impurities raise the boiling point of liquids.



By adding salt it means that you are adding an impurity into the water. Impurities can lower the boiling point, while increasing its melting point.