Solubility?

Question

26. Which of the following will have the highest rate of solubility?
a sugar cube in boiling water
a sugar cube in room temperature water
a sugar cube in refrigerated water

27. Which of the following will have the highest rate of solubility? granulated salt in water granulated salt in benzene (benzene is a non polar liquid)
granulated salt in gasoline

28. Which of the following will have the highest rate of solubility?
a sugar cube in water
a block of salt in water
a scoop of lard in water

29. Which of the following will have the highest rate of solubility?
granulated sugar in warm water
a sugar cube in warm water
granulated sugar in cool water

30. Which of the following will have the lowest rate of solubility?
stirred lard in water
stirred salt in water
unstirred salt in water


please tell me how this is done....i know solubility is the rate of which they dissolve but how do i know which one dissolves the fastest?

Answer 1

Whether or not something dissolves in a liquid depends on the ability of the solvent to interact with the (or ions) of the solute. How FAST something dissolves depends on the temperature of the solvent (warmer liquids will dissolve solutes more quickly than will cold solutes) and on the size of chunks of the solute. So, sugar dissolves more quickly in hot coffee than in iced tea, and granulated salt dissolves more quickly than rock salt. Stirring just moves the dissolved substance away from the undissolved, and will also speed up dissolving.

With those ideas, you should be able to answer all your questions.

Answer 2

The first four are all answer "a". The last is "b".

Small particles, an ionic solute and hot water as the solvent are the best conditions.

Answer 3

26-a
28-a
29-a
30-c

27 just a guess.. a...

It is function of relative density isnt it?