Question

The solubility of sodium chloride is 35.9 g/100 g H2O at 20°C. 35.9 g of sodium chloride are added to 100 g of water, and all of it dissolves. Another solution is made from the same amount of salt and the same amount of water. This time some solid remains undissolved.



What factor could cause the difference?



solute purity

volume

temperature

beaker size

Answer 1

termperature.

Answer 2

Some molecular compounds, such as HCl, ionize completely in solution. Some molecular compounds such as HC2H3O2 do not ionize completely when they dissolve in water.

Which explains their solution properties?


HCl and HC2H3O2 have the same effect on the properties of the solution.

HCl lowers the freezing point of water more than HC2H3O2 does.

HCl lowers the boiling point of water more than HC2H3O2 does.

Answer 3

HCl lowers the boiling point of water more than HC2H3O2 does.