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A solution contains [Ba2+] = 5.0 × 10^-5 M, [Zn2+] = 2.0 × 10^-7 M, and [Ag+] = 3.0 × 10^-5 M. Sodium oxalate (Na2C2O4) is slowly added so that the following salts are formed.
Salt: BaC2O4 ZnC2O4 Ag2C2O4
Ksp: 1.5 × 10^-8 1.35 × 10^-9 1.1 × 10^-11
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