Question

Calculate the solubility at 25 °C of Co(OH)2 in pure water and in a 0.0130 M CoCl2 solution. You'll find K, data in the ALEKS Data tab. Round both of your answers to 2 significant digits. solubility in pure water: 60 - solubility in 0.0130 M CoCl2 solution: 60 - xs ?

Answer 1

Solution solubility of As per question, we have to calculate the Co Con in water. Let the solubility of Colon in water best Colt + 200 Ksp=5.92X 10-15 . Co con At equilibratan quilibonem 25 Al Kap- sx(25) 2 5.92x10-15 = Us? - 5.92x10-1s 1.48 x 10-15 = 1.13x10-5M In order to to convert Molority into gll me here to add multiply the quantity by a motor mass. 1

Cherefore solubility in git) = 1:13 x 105 x 92.948 g/L = 105.03 0X105 g/L = 11050810-5 912 Molar man of to low, 92-948g = 11x10-5giL . In a significat digits

cet the solubility of color, in coll be also 's Intral Coll & Co²t + 2a 0.0130M - – 0.030M 0.000M At equilibrum . The concentration of Co²l = 0.00OM. Ksp- 5.92x10-15 Cocos - Co2 + 2 on- Alqinlibrium – 0.030M 25. Ksp= (60°) Coon) - 5.92*1095= 0.0130 X (28)? 452 5.92X1015-0.0130 x ) ) 113.8 4x1045- S? s' tot 11.384 X10-14 3.374 x 10-7M. solubility in g/= 3.374 X 107 X 92.948 g IL 3 31.0x 10-7 g/L Moler mas of Coloma =92-9489