Table 2 K Selected Kp Values And Solubility At Temperatures Around Room Temperature From 18 To 25 C Cation Ci Precipi 1 (51.33 KiB) Viewed 68 times
Table 2: K Selected Kp values and solubility at temperatures around room temperature, from 18 to 25°C* Cation CI Precipitating Agents C₂O OH SO Group A: CO;² insoluble 1.8x10-10 Ag Pb2 1.5x10-8 1.3x10-11 1.5x 10-5 1.7x10 8.1x10-12 1.2x10-15 2.7x10 1.6x108 7.4x10-14 SubGroup B1: soluble i alkali Mn S 1.6x10-13 i Fe 5.0x10-10 S 1.6x10-39 S Bi³+ insoluble SubGroup B2: AP s alkali 3x10-3 Cr³+ S 1.6x10-30 S Group C: Ba 5x10-³ 1.1x10-10 2.0x109 Ca² Spi 6.5x10 2.4x10 3.3x109 3.2x10 3.2x107 5.4x10-10 Group D: SINH NHẬ soluble Mg 16.3x10-10 Cu²+ S 3.5x10- 2.2x10-20 N₁2 S 3x10-12 6x10-16 Zn²- S 3x10-16 1.3x10 1.0x10 10 S *Abbreviations: s-soluble NHANH' – buffer pH 9-10 S soluble S S soluble S S S soluble S S S S i-insoluble S s alkali i in NH(aq) 1.6x106 2.6x10⁹ 1.6x10 8.6x10 s NH sNH s NHS alkali-NaOH
Which two anions studied in part (a) could possibly be used to selectively precipitate the Group C cations while leaving the Group D cations in solution? hydroxide oxalate sulfate carbonate
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