Hello! Two questions that I would like to get some help with. I'm translating these so I hope I get it right. 1. The solubility of cobalt(II)hydroxide is 5.4*10^-6 moles/dm^3 in water. i) What is the solubility product? ii) What is the solubility of cobalt(II)hydroxide if pH is buffered to 10.43? In i) I've calculated Ks to 6.3*10^-16 which is correct. The answer in ii) is 8.6*10^-9. 2. pH in a saturated magnesium hydroxide solution is 10.52. Calculate the solubility product for magnesium hydroxide. The answer is 1.8*10^-11. I've tried to solve them for a long time but I can't get it right. I need some help on how to approach problems like these.