Chapter 16 Continuation AxBy xAy yBx Ksp Ay x Bx y AgI s Ag aq I aq Ksp Ag I Every insoluble solid will have molar solubility s AgI s Ag aq I aq s s Ksp s2 Cu OH 2 Cu2 aq 2OH aq s 2s Ksp s 2s 2 4s3 Q Ksp unsaturated solution no precipitate Q Ksp supersaturated solution precipitate Predicting Precipitation 2 mL of 0 2 M of NaOH mixed with 1 L of 0 1 M CaCl2 Will a precipitate form NaOH Na OH CaCl2 Ca2 2Cl Ca2 2OH 1 What is the precipitate Ca OH 2 2 Find Q Ksp 8 0 x 10 6 Q Ca2 OH 2 You need to find the concentrations of both Ca2 and OH Moles of CaCl2 1 M x 1L 1 moles Moles of NaOH 2 M x 002 L 0004 CaCl2 Ca2 0 1 moles 1 L 1 M Ca2 usually you would add both the volumes of CaCl2 and NaOH but in this case it won t make much of a difference since the change will be minimal OH 0004 moles 1 L 0004 M OH Q 1M 0004 2 1 6 x 10 8 1 6 x 10 8 Ksp 8 6 x 10 6 NO PRECIPITATION WILL OCCUR Group 1 ions do not precipitate
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