Question

Calculate the solubility at 25 °C of Co(OH)2 in pure water and in a 0.0190 M COCI, solution. You'll find K, data in the ALEKS Data tab. Round both of your answers to 2 significant digits. solubility in pure water: 8 0. 0. solubility in 0.0190 M CoCl, solution: 01

Answer 1

A Co CoH) 5.92 O5 M ksp of Co (o H) 2 C.COHI2 Cot 20H initial Final 25 Cco#COH Ksp 5.92 X /015 (9) (25)2 17 4535.72 Xlo5 48X70-15 1-139 X 10 /L moo Co(OH) in Cocl, of 0.0190 M. Co 0.0190M That means initially we have Co Cot) Co2t + 20H 2 Initial 0.o190 25 Sto.0190 Final Ksp -7

Ksp(5+0.0190) (25) O.O140 S+o O190 (o.0190) (4 5) 5.92 Xr015 432 D.O190 311-57x10-15 481 1 7.7 89 X 10 S 79 XO M Thay asted Solubity in Molari mas ot Co CoH), by molas solubility mulh ply Co CoH) .qu 9mo Molar Mans ot Co(oH)1-1 39 Xi0 of -5 X 92.94 058 XIo 9 SolubiGty in puve wartes) 2.79 XIOX 92.99L Solubility in Cocly S e 259.30 X10 -5 9.593 X10 7/6