A solution of Na3AsO4 is added dropwise to a solution that is 0.0411 M in Bi3+ and 2.66e-08 M in Cd2+.   The Ksp of BiAsO4 is 4.43e-10. The Ksp of Cd3(AsO4)2 is 2.2e-33.         (a) What concentration of AsO43- is necessary to begin precipitation? (Neglect volume changes.)   [AsO43-] = M.       (b) Which

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A solution of Na3AsO4 is added dropwise to a solution that is 0.0411 M in Bi3+ and 2.66e-08 M in Cd2+.

 

The Ksp of BiAsO4 is 4.43e-10.

The Ksp of Cd3(AsO4)2 is 2.2e-33.

 

 

 

 

(a) What concentration of AsO43- is necessary to begin precipitation? (Neglect volume changes.)

 

[AsO43-] = M.

 

 

 

(b) Which cation precipitates first?

 

Bi3+Cd2+    

 

 

 

 

 

 

(c) What is the concentration of AsO43- when the second cation begins to precipitate?

 

[AsO43-] = M.

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