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Solubility Product (K sp )

Solubility Product (K sp ). Everything dissolves in water to a point. K sp expressions. CaF 2 (s)  K sp = [Ca 2+ ][F - ] 2 K sp is really no different than any other K so far. Ca 2+ (aq) + 2 F - (aq). Calculating K sp form solubility(M).

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Solubility Product (K sp )

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  1. Solubility Product (Ksp) Everything dissolves in water to a point.

  2. Ksp expressions CaF2 (s)  Ksp = [Ca 2+][F -]2 Ksp is really no different than any other K so far. Ca 2+ (aq) + 2 F- (aq)

  3. Calculating Ksp form solubility(M) The solubility of Bi2S3 is 1.0 x 10 -15 M, calculate the Ksp for Bi2S3. Write dissociation equation. Bi2S3 (s)  I 1.0 x 10 -15 0 0 C +(2)(1.0 x 10 -15) +(3)(1.0 x 10 -15) E 2.0 x 10 -15 3.0 x 10 -15 Ksp = [Bi3+]2[S2-]3 =1.1 x 10 -73 2 Bi 3+ (aq) + 3 S 2- (aq) =(2.0 x 10 -15 )2(3.0 x 10 -15 )3

  4. Calculating Solubility from Ksp Calculate the solubility of copper (II) iodate from its Ksp value of 1.4 x 10 -7. Cu(IO3)2 (aq)  I M 0 0 C +X +2X E X 2X Ksp = [Cu2+][IO3-]2 4X3 = 1.4 x 10 -7 X = 3.3 x 10 -3 M Cu(IO3)2 Cu 2+ (aq) + 2 IO3– (aq) = (X)(2X)2 = 1.4 x 10 -7

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