Asked by CHEMISTRY
A solution of Na2CO3 is added dropwise to a solution that contains 1.34×10−2M Fe^2+ and 1.33×10−2M Cd^2+ . What CO3^2- concentration of is need to initiate precipitation? Neglect any volume changes during the addition.
Answers
Answered by
DrBob222
Look up Ksp for FeCO3.
Look up Ksp for CdCO3.
Write Ksp expression for FeCO3.
Write Ksp expression for CdCO3.
Solve FeCO3 expression for CO3^-2 using iron(II) given.
Solve CdCO3 expression for CO3^-2 using Cd^+2 given.
The smallest concn calculated will be the minimum concn of CO3^-2 needed to start pptn. Check my work.
Look up Ksp for CdCO3.
Write Ksp expression for FeCO3.
Write Ksp expression for CdCO3.
Solve FeCO3 expression for CO3^-2 using iron(II) given.
Solve CdCO3 expression for CO3^-2 using Cd^+2 given.
The smallest concn calculated will be the minimum concn of CO3^-2 needed to start pptn. Check my work.
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