Which of the following statements is TRUE?

Question

Which of the following statements is TRUE?

 
In general, the solubility of a solid in water decreases with increasing temperature.

The solubility of a gas in water usually increases with decreasing pressure.

The solubility of an inoic solid in water is not related to its crystal solubility.

in general, the solubility of a gas in water decreases with increasing temperature.

None of the above are true.

Answer 1

You can figure this out from everyday knowledge about the world around you. I am going to give you specific examples to help you determine whether each statement is true or false.

 

statement 1: does sugar dissolve more in a hot tea or a cold tea?

 

statement 2: which soda keeps its fizz (gas) best? soda in an open glass (low pressure) or soda in a closed bottle (high pressure)?

 

statement 3: table salt (NaCl) and marble (CaCO₃) are both salts. Do both salts dissolve the same? In essence, will a marble statue dissolve as easily as a salt statue?

 

statement 4: which soda goes flat faster? a hot soda or a cold soda?

 

if you determine that statements 1-4 are all false, the 5 is the answer.

 

I know that I am not giving you the answer straight out here, but I think that you have ability to solve this based on your experience.