solubility (4-5) (paper 2)
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what is solubility often measured in
grams of solute per 100g of solvent
what is solubility
The grams of solute per 100grams of solvent at a given temperature
what can you do to increase the solubility of a solute
increase the temperature
what is the name given to the graph that compares solubility to temperature
solubility curves
what practicle can you do to investigate how temperature affects solubility
• make a saturated solution by adding ammonium chloride to water at an excess • stir and place in water bath • check after 5 mins that all excess has sunk and it is 25C • weigh empty evepourating basin • pour some solution (not the excess) in basin • re-weight basin • heat gently • once evapourated weight pure ammonium chloride • repeat at different temperatures and plot graph
what is the equation to calucates soolubitity form the masses of the solid and water
solubility = (mass of solid (g) / mass of water removed (g)) x 100