solubility Flashcards
definition of solubility
mass of solid required to saturate 100 g of water at a particular temperature
soluble
- all sodium, potassium and ammonium salts
- all nitrates
- most chlorides, bromides, and iodides except silver and lead chlorides, bromides and iodides
- most sulfates except lead and barium sulfates. calcium sulfates are slightly soluble
Insoluble
- most carbonates except sodium, potassium and ammonia carbonates
- most hydroxides except sodium, potassium and ammonia hydroxides
- most oxides except sodium, potassium and calcium oxides which react with water
definition of solvent
liquid into which solute dissolves
definition of solute
solid which dissolves
definition of solution
formed when a solute dissolves in a solvent
definition of anhydrous
has no water of crystallisation
definition of hydrated
has water of crystallisation
definition of water of crystallisation
water has chemically bonded into the crystal structure
saturated solution
no more solid will dissolve in the liquid at the temperature
what happens the solubility of most solids when temperature is increased
solubility increases
what is solubility measured in
grams of solid per 100g of water
solubility graph what is the x and y axis
x= temperature
y= solubility g/100g
method for determining the solubility of a solid
- weigh a dry boiling tube
- add some solid and re-weight
- now add 10 cm3 of distilled water to the boiling tube
- place a thermometer in the boiling tube
- heat the boiling tube in a water bather until all the crystals dissolve
- allow the solution to cool and record the temperature at which crystals appear
what happens the solubility of gases as the temperature is increased
the solubility decreases