Question

A student heated a salt water solution to obtain the salt from the solution. Why the student
heated the salt water solution?​

Answer 1

Answer:

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Explanation:

So that the water can evaporate and the salt dissolved in it can be separated

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Answer 2

Answer:

Heating the solution causes the temperature of the salt solution to rise. Increasing the temperature of the salt solution increases the rate of evaporation.

Evaporation is the change of a substance from a liquid phase to a gas phase. Evaporation occurs due to an increase in the kinetic energy of the particles of the substance. Kinetic energy is the energy of motion. Temperature is simply a measurement of average kinetic energy.

After heating, the solution becomes more concentrated as water evaporates from the mixture. The other thing that happens is that the electrical conductivity increases with heat (and evaporation) - up to the point where it eventually levels off. As the solution becomes more supersaturated, salt crystals form/precipitate as the solution eventually cools. Also, salt solubility (Ksp, solubility product) usually increases with increasing temperature.

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