3.5 Chem 12 Altering Solubility of a Salt

if we increase the rate of dissolving more than the rate of crystallization

then more AgCl will leave the solid state and enter the aqueous state

• the solubility of AgCl increases

  (if a substance is highly soluble, it dissolves more)

if we increase the rate of crystallization more than the rate of dissolving

then more Ag and Cl will leave the aqueous state and enter the solid state

• solubility of AgCl decreases

  (if a substance has low solubility, almost none of it dissolves)

decreasing the solubility of the solid in eqm

shifts to the solid side

increasing the solubility of the solid in eqm

shifts to the ions side

increasing and decreasing the solubility refers to the ___

solid salt

changes in solubility are accomplished by

altering the concentration of the dissolved ions

increasing [ ] of ONE ion in this system

shifts system left

• to use up added ions

• therefore, causing more solids to form

adding AgNO3 increases [Ag+]

adding NaCl increases [Cl-]

common ion effect

lowering solubility of a salt by adding a second salt which has one ion IN COMMON with the first salt

common ion effect is used to

prevent a salt from dissolving to any great extent or to force a particular dissolved ion to leave a solution