Asolution is saturated in both nitrogen gas and potassium bromide at 750c. when the solution is cooled to room temperature, what is most likely to happen? why? (5 pts)

a. some nitrogen gas bubbles out of solution.

b. some potassium bromide precipitates out of solution.

c. some nitrogen gas bubbles out of solution and some potassium bromide precipitates out of solution.

d. nothing happens.

Some of the potassium bromide precipitates out of the solution.  

•The solubility of the gas is inversely proportional to the temperature. With the decrease in temperature, the solubility of the gas increases.  

•Therefore, in the given case, nitrogen will not move out, in spite of that opposite will take place, that is, more atmospheric nitrogen will get dissolve in the solution.  

•The solubility of ionic salts like potassium bromide is directly corelated to the temperature, that is, the solubility of the salt decreases when the reduction in temperature takes place.  

•The precipitation of some of the salt takes place because solubility is low at lower temperature and the excess salt stays in solid form.  

Thus, some of the potassium bromide precipitates out of the solution .

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Some Potassium bromide precipitates out of solution.

Option B.

Solubility is defined as the tendency of a substance to get mixed into a solvent at a particular temperature and pressure. The amount of solubility is defined as the amount of substance in grams which will make a saturated solution of 100ml at a temperature and pressure.

Potassium bromide is a salt and nitrogen is a gas. The solubility of the salts generally increase with temperature in water, and decreases with decrease in temperature. So in case of potassium bromide, the solubility of the salt will decrease, leaving some precipitate in the room temperature.

While in case of gases, the solubility of them do decrease with increase in temperature. So at room temperature, solubility of nitrogen will be more than that in 750°C. So no gas will bubble off.

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