What 3 factors affect the rate at which a substance dissolves?
Agitation(stirring), temperature and particle size
What is the name given to a solution that holds the maximum amount of solute possible at a given temperature?
What kind of substance is less soluble as temperature increases?
Why does a cold river have more dissolved oxygen?
The molecules have less kinetic energy.
How does salt affect the freezing point of water?
It lowers it.
Why does a solute affect the freezing point?
It disrupts crystal formation of the solvent.
Suppose you have powdered sugar, granulated sugar and a sugar cube along with hot and cold water. Which pair would dissolve fastest?
Powdered sugar and hot water
Suppose you have large salt crystals and small salt crystals which are found in stirred water and unstirred water . Which combination would dissolve fastest?
Small crystals and stirred water.
What happens if you increase the collision rate between the solute and solvent?
The rate of dissolving increases.
What 2 variables affect the solubility of gases in liquids?
Temperature and pressure
What happens to gas solubility as temperature increases/
What will happen to the amount of oxygen in oceans, lakes and rivers as global warming occurs?
The amount of oxygen will decrease
What happens to the solubility of most solids as temperature increases?
Which state of matter has the most entropy?
Which state of matter has the least entropy?
What is a good synonym for entropy?
randomness, disorder, disorganization, chaos